Wimbledon live: Andy Murray beats Sam Querrey

7.57pm: Match point - and Lu takes it, on Roddick’s serve! He wins 4-6 7-6 7-6 6-7 9-7. Lu sinks into his chair, head in his hands, looking emotional; Roddick makes a swift exit from court. Julian Muscat reports: “Roddick moves to the net behind an ordinary approach and makes one volley, but Lu rips a forehand down the line for an improbable triumph. The writing was on the wall for Roddick who failed to deploy his explosive forehand throughout the final set. Lu is the first Asian male player to reach the Wimbledon quarter-finals for seven years. This is his 19th grand slam tournament, and by far his best. And Roddick had won their three previous encounters without dropping a set.”

7.52pm: Lu leads 8-7. And Nadal has taken that second set 6-2.

7.49pm: And Roddick pulls it back to 7-7. We can’t be in for an epic - surely?

7.45pm: Lu leads 7-6 in the final set, and Nadal’s about to wrap up the second set against Mathieu.

7.33pm: Julian Muscat reports: “Another break point for Roddick at 4-4 - and another fine recovery from his unseeded opponent, who makes a winner from a difficult volley. Lu continues to press while Roddick continues to fence for errors from his inspired opponent, who is offering him precious little. 5-4 to Lu, who beat Murray at the 2008 Olympic Games.”

7.30pm: Provisional order of play for the women’s quarters tomorrow -

Centre Court (1pm) - Kim Clijsters v Vera Zvonareva; Serena Williams v Na Li
Court No 1 (1pm) - Tsvetana Pironkova v Venus Williams; Petra Kvitova v Kaia Kanepi

7.23pm: Skupski and Baltacha, the other British doubles pair in action tonight, have taken their first set 6-4 against Knowles and Srebotnik, the fifth seeds.

7.20pm: Enthralling stuff on Court No 2, where Julian Muscat writes: “Andy Roddick is struggling mentally in his match with Yen-Hsun Lu, the unseeded player from Taiwan. The American had two break points at 2-2 in the fifth, but played both of them passively and Lu saved both with winners. You’d expect Roddick’s greater experience to count from here, but with his negative mindset, I’m not so sure...”

7.10pm: Now that Murray and Querrey have scampered off Centre so quickly, the mixed doubles is moving in there - top seeds Nenad Zimonjic and Samantha Stosur play Colin Fleming and Sarah Borwell of Great Britain.

7.05pm: Julian Muscat reports: “It wasn’t all entirely in vain where Nicolas Mahut is concerned. Despite his lowly world ranking of 148, the man who made history with John Isner last week has been given a wild card into the grass-court tournament at Newport, Rhode Island, next week. He crossed the Atlantic yesterday, but only after fulfilling countless media requests in his native France.”

7.03pm: Nadal takes the first set against Mathieu, 6-4.

6.58pm: Patrick Kidd gives his views on Murray’s win: “Just been watching Murray on Centre and I’m impressed by how fast he moves between points. In that penultimate game, when he broke Querrey, he never gave up on any ball, scampering side to side, from back to front, in pursuit. He really does look as fit as one of those fiddly things, which is heartening as Tsonga will be a very tough opponent in the quarters.”

6.55pm: Make that 7-5, game, set and match to Soderling, who wins 6-2 5-7 6-2 3-6 7-5.

6.54pm: And Roddick takes the breaker. Into a fifth set there, as they are on Court 12 where Robin Soderling is 6-5 up in the fifth against David Ferrer.

6.52pm: Lu and Roddick are in a fourth-set tie-break.

6.51pm: Game, set, match Murray - all without dropping a set again. He really is in exceptional form at the moment. Who’d have thought it after that pretty dire display at Roland Garros?

6.46pm: And then he does! Murray leads 5-4 in the third set - he’s serving for the match.

6.45pm: Murray keeps getting to break point and then not capitalising.

6.44pm: After his impromptu shirt-ripping striptease, Novak Djokovic has calmed down sufficiently to say: “We both expected a long and difficult match. We played a long match here three years ago and it was something similar this time. It could have gone either way but I played the right shots at the right time. I was fortunate to pull out a break at 4-4 in the fourth set and then I played a great service game.”

6.37pm: Murray holds - four all in the third set.

6.28pm: Nadal’s on court now against Mathieu - one game all so far. Sam Querrey leads Andy Murray by three games to two in the third set.

6.12pm: And he only needs one of them. Murray leads 7-5 6-3.

6.11pm: Two set points for Murray.

6.09pm: Querrey holds, making it 5-3, and making Murray serve for the set once more.

6.05pm: Man of stats Patrick Kidd notes: “Just spotted an interesting factette about Andy Murray. With Yen-Hsun Lu losing a set to Andy Roddick and Robin Soderling dropping one against David Ferrer, it means that Murray is now the only man left in the men’s competition who has not - yet - dropped a set. Here’s hoping that continues...” One more game and he’ll have secured the second set to take a two sets to love lead.

5.55pm: Official Wimbledon Twitter reports: “Wow @Wimbledon man of mystery Yen-Hsun Lu takes the lead over @AndyRoddick 4-6 7-6 7-6. Is this match going to be the #shockoftheday?” Meanwhile, Murray goes a break up in the second set.

5.51pm: A good day for Kim Clijsters; she and doubles partner Xavier Malisse have beaten Andy Ram and Elena Vesnina 6-3 6-2. And after all that Novak Djokovic takes the fourth set and the match by three sets to one, 7-5 6-4 3-6 6-4. He promptly begins to strip and throw his clothes into the crowd, revealing pink physio tape across his neck and shoulders.

5.45pm: Andy Murray’s serve isn’t looking strong at the moment - too many faults being called. Let’s hope the truculent temperament doesn’t emerge.

5.44pm: Four all in that Djokovic-Hewitt fourth set now.

5.40pm: Belgian duo Kim Clijsters and Justine Henin have been having a chat about their match earlier. “I was just very overwhelmed in the beginning by the speed of her game,” said Clijsters about her woeful first set. “She was definitely overpowering me on every aspect of the match. She was serving extremely well, returning extremely well. She was just on top of every shot that I hit. I wasn’t helping myself by giving her a lot of second serves. Because she was playing so well, I started trying to go for the lines, maybe overdoing it a little bit too much. But I had to do that.

“In the second set, I was able to do what I was trying to do at the end of the first set. I was definitely going for the lines a lot better, keeping the pressure on her. And I made a lot more first serves. I played really good tennis in that second and third set.”

Henin gave credit to her opponent but said that the injury to her arm, incurred after a fall, affected her game slightly: “It wasn’t easy mentally to deal with when I fell down on the court for the few games after, but after that it was warm and I could play. I don’t really know how it affected me, on serve and backhand a little bit. It’s a little worse now than during the match. I hope it’s nothing serious, but it’s quite painful now.”

5.36pm: Murray breaks again to take the first set 7-5. Phew. Hewitt’s 3-2 up in the fourth set against Djokovic - this one’s heading for a decider.

5.31pm: 6-5 to Murray. Petra Kvitova, who beat Caroline Wozniacki in straight sets earlier for a bit of an upset, believes she has the perfect game for grass: “I play very well on the grass and I play very fast. She didn’t play her game, so maybe that’s why I was quick. Every shot was working and the serve was great. I’ve been practising my serve a lot.”

5.26pm: Five games all for Murray and Querrey.

5.22pm: And Querrey breaks, after Murray drops two set points. Ouch. Meanwhile, one set all between Lu and Roddick, and Soderling and Ferrer.

5.17pm: Think it’s hot? Think again. Roger Federer (who to be fair is the coolest man in sport) says: “This is not hot. This is normal to me anyway. Maybe for England [it is hot], for Switzerland as well. But we’re used to playing in 35, 40 degrees sometimes. This is moderate. Very comfortable to play in. This is a one-shirt-change kind of match. That’s rather easy.”

5.16pm: Murray now serving for the set.

5.12pm: 5-2 to Murray. He really is playing brutally well.

5.11pm: Hewitt takes that third set 6-4. Proper match on our hands over on Court No 1.

5.04pm: And another hold for Murray to lead 4-1.

5.02pm: That medical time-out seems to have had an effect - Lleyton Hewitt is now 4-2 up in the third set against Novak Djokovic. And Murray breaks Querrey to go 3-1 up.

4.58pm: All going with serve so far on Centre. Queen Serena has reflected on her win this afternoon, saying: “She [Sharapova] played really well. I wasn’t able to play as well as I wanted but I thought she played so well. I was telling myself to relax and I was able to do that.”

4.52pm: All over on the court of crazy - Tomas Berdych has beaten Daniel Brands 4-6 7-6 (7-1) 7-5 6-3.

4.51pm: Andy Murray holds to take the first game but that was definitely tougher than he expected or than he’s faced so far - Querrey took the first two points of the game and pushed him to deuce.

4.49pm: More from the juniors with Alyson Rudd: “How can you tell you are watching boys and not men? Francis Casey Alcantara takes a first set 6-1 lead against Gregoire Barrere in the Boys Singles but loses the second set 1-6. And then, of course, in the third it is all very tight.”

4.46pm: Worrying news from Court No 1 and the official Wimbledon Twitter: “Trainer out to Novak Djokovic. Looks like he’s not feeling too well. Taking medical time out @Wimbledon.”

4.45pm: Murray to serve. Here we go.

4.40pm: The triumphant Laura Robson has also had a few things to say, to wit: “I think today was a lot tougher than the scoreline suggested but I thought I was really focused during the match, I didn’t make many errors, and so it was pretty good. I was 6-0, 5-0 up, and I’ve never won love and love before, but I still couldn’t do it.

“I wanted to play juniors because I want to get more matches, and it would be nice to win it again, but for now that’s not my main priority, I’m just trying to focus on one match at a time. I just want to improve my ranking and keep getting better so I can eventually play on Centre Court.

“I feel like I had three good matches last week, not the results that I wanted, but I feel like I have more experience than most of the other juniors, so hopefully I can transfer that to when I’m playing.

“The other girls will be thinking they’ve got nothing to lose, so they’re always going to play well against me, and hopefully I’ll have some good matches this week.”

4.39pm: Right, it’s nearly Murray time. Hold on to your sunhats.

4.37pm: Venus has been talking after her defeat of Jarmila Groth earlier today. She said: “I think we both were serving very well, so that definitely made it close. There wasn’t a lot of room for error for either one of us against each other’s serve.

“I think she just played really well today. I didn’t think she made too many errors. She just really played some smart tennis and took advantage of her opportunities. I thought I played well at the end to close it out.”

They were out on Court No 2, but Venus arrived 10 minutes late, which she explained by saying: “I didn’t know the procedure for Court Two, so I was waiting on someone to get me. No-one came. So eventually I just came out.”

4.33pm: Djokovic takes the second set 6-4, and is 1-0 up in the third. Hewitt struggling there.

4.30pm and 15 seconds: And Queen Serena storms on, though that was a work-out for her against Maria Sharapova. She wins 7-6 6-4.

4.30pm: Laura Pitel writes: “A very weary man has just sat down next to me. ‘I camped out all night to be here,’ he tells a neighbour on our shady bench. ‘But it was so noisy I couldn’t sleep. I keep trying to watch the tennis but find myself jolting awake to discover that several points have gone by.’ The poor guy has now retired to our bench for a strategic nap.” Serena’s serving at match point now.

4.26pm: The women’s seeds are all over the place in the singles and the doubles this year. Vania King and Yaroslava Shvedova have just beaten Nadia Petrova and Samantha Stosur, the third seeds, 6-4 6-4.

4.20pm: Sad news about Jennifer Capriati, it seems; she’s been taken to hospital after an overdose. She was the youngest-ever semi-finalist at Wimbledon aged 15. Lindsay Davenport tweets: “Let’s send some positive thoughts to Jen Capriati if reports are true.”

4.15pm: Neil Harman reports from the juniors: “I have to confess I had not seen James Marsalek, the young Brit, play before and was very impressed with his straight-set victory over the No 2 seed Agustin Velotti of Argentina in the first round of the boys singles. The 18-year-old from Somerset had a tortuous route into the event, eventualy winning the qualifying competition played at Roehampton last week. He has a good solid compact game and like Ashley Hewitt, his compatriot, a sound temperament. Encouraging.”

4.11pm: Djokovic is 4-3 up in the second set againt Hewitt. Tomas Berdych and Daniel Brands are fighting out a close one, but Berdych is shading it for the moment, two sets to one up.

4.05pm: Andy Roddick takes the first set against Yen Lu by six games to four.

3.51pm: Sharapova may rue missing that set point, because Serena’s won it in a tie-breaker. Elsewhere, celebrity culture reaches Wimbledon, as Laura Pitel reports: “I just followed a group of four children, aged between about seven and nine, as they tore after Jo-Wilfried Tsonga when he left Court 12. The Frenchman had just beaten his compatriot, Julien Benneteau, and was being marched back to the players’ area by a member of the Wimbledon staff. ‘Quick,’ shouted one of the girls, as they raced along behind him. ‘He’s getting away,’ shouted another. They managed to keep pace all the way to the locker rooms, where Tsonga obligingly signed their giant souvenir tennis balls. ‘Do you know who that was?’ asked the security guard on the door as they stood around, beaming. Looking not even a tiny bit bashful, they answered in unison: ‘No.’”

3.43pm: Official Wimbledon Twitter reports: “Qualifier Kaia Kanepi beats Zakopalova 6-2 6-4 - her 26th win from 28 matches - to reach @Wimbledon quarter-finals!” Meanwhile, Sharapova drops set point against Serena, and Djokovic takes the first set against Hewitt 7-5.

3.37pm: More juniors - Ashley Hewitt of Great Britain has beaten Marco Cecchinato 6-2 6-1.

3.34pm: Neil Harman reports: “Roger Federer enters the goal-line technology debate. The England Germany match is mentioned and the champion says: ‘I have to be careful. Who is the head of Fifa? I don’t remember. If he a Swiss guy by any chance? We have in tennis, what is it, electronic line calling, even though we don’t need it (he has never been a fan). They (football) should have it and they don’t. It’s a choice the guys at the top have to make. They (England) could have been sent home because of that single mistake. It’s incredible.’”

3.32pm: Jo-Wilfried Tsonga has beaten compatriot Julien Benneteau 6-1 6-4 3-6 6-1.

3.28pm: More promising junior results for Team GB - James Marsalek has beaten second seed Agustin Velotti of Argentina 6-3 6-2.

3.16pm: By the way, Kvitova’s win took her just 46 minutes.

3.15pm: All cagey out on Court No 1, with Novak Djokovic 3-2 ahead of Lleyton Hewitt.

3.09pm: Caroline Wozniacki has been TROUNCED by Petra Kvitova, 6-2 6-0.

3.08pm: Vera Zvonareva has said that she was surprised when Jelena Jankovic sought treatment earlier today - she reckons she hadn’t noticed any problem with her opponent’s game.

“I hadn’t noticed it,” she said. “I was not paying attention to the other side. I knew that in this match I had to concentrate on myself and I had to go for my shots no matter what, because she’s a very good player. And I was trying to take it one point at a time.

“To be honest, I wasn’t paying any attention to what was going on on the other side. I hadn’t noticed anything until she called the trainer on the court. I’m not sure exactly what it was. She said something is really bothering her. I just wished her a quick recovery. I hope it’s nothing serious and she can recover quick, be back for the hard court season.”

3.05pm: Serena breaks to go 3-1 up in the first set.

3.04pm: Injury alert at SW19 - but not a player. Laura Pitel reports: “Duilio Beretta, who is playing Mikelis Libietis on Court No 11 in the boys’ juniors, just sent a forehand flying into the stands of No 2 Court, about 40 metres away. A few seconds later, a rather bemused ten-year-old popped his head out, looked around, and sat back down again, none the wiser as to who was responsible for the rogue ball. Hopefully, he hasn’t too sore a head - lucky he’s a fan of tennis rather than cricket.”

2.52pm: Julian Muscat reflects on Federer’s win: “Did someone suggest that Roger Federer’s there for the taking? A full house on Centre Court - all 15,000 of them - would beg to differ after the way Federer crushed poor Jurgen Melzer. There’s only one word to describe it: ruthless. Melzer can match most from the baseline but Federer had too much of everything for him. The Fed express is certainly back on track.”

2.49pm: Serena’s up next against Maria Sharapova. Caroline Wozniacki’s lost her first set against Petra Kvitova, 6-2 - could there be a shock on the cards there?

2.45pm: Laura Robson has steamrollered her way into the second round of Junior Wimbledon; Risa Ozaki of Japan is vanquished 6-0 6-1.

2.36pm: Federer cruises through 6-3 6-2 6-3. And Kim Clijsters wraps up her victory as well, 2-6 6-2 6-3 - congratulations to her, great comeback.

2.34pm: Clijsters breaks! 5-3 up and she’s serving next.

2.30pm: The Fed’s 4-3 up on Centre. Told you this one would be over quickly. The Belgian ladies, however, are continuing to scrap it out - Clijsters is leading 4-3 in the third set but Henin’s on serve.

2.21pm: Good news from Court 15. Alyson Rudd reports: “Laura is really bossing this one. She has won nine straight games. Not very British, mind, to be such a bully but the received wisdom is she can win a grand slam and today you can see why.”

2.19pm: Team Flemski made more of a fight of the third set, taking it to a tie-break, but the Bryan brothers still won - 6-2 6-4 7-6(5).

2.16pm: Tsvetana Pironkova of Bulgaria has beaten Marion Bartoli, the eleventh seed, 6-4 6-4. And after Jelena Jankovic’s withdrawal through injury earlier today, she and doubles partner Chanelle Scheepers are out of their competition, handing the win to fourth seeds Gisela Dulko and Flavia Pennetta.

2.09pm: Neil Harman confesses: “Egg on the face. Chatting with David Felgate, Tim Henman’s former coach and BBC Five Live summariser this morning, I said that I thought Jurgen Melzer would give Roger Federer a hard time on Centre Court today. After two sets, I wish I’d kept that thought to myself, because Felgate keeps coming up saying, ‘Roger’s having a hard time, isn’t he?’” Well, quite. Federer leads 6-3 6-2.

2.08pm: Meanwhile, Kim Clijsters breaks to take the second set 6-2. Much more like it.

2.07pm: Neil Harman writes: “I have given up counting the number of times that Simon Barnes has been patted on the back and been required to shake hands after his brilliant column in The Times this morning on the LTA.”

2.02pm: A genuine LOL moment from Alyson Rudd: “How do I know the camera showing footage on Court 15 is a fixed camera? Because a spider has just ambled across it, obscuring footage of Laura Robson who has, incidentally, started very powerfully against Risa Ozaki.”

2pm: And here’s Patrick’s report: “Venus Williams goes through, 7-6 in the second-set tie-breaker against Jarmila Groth. It was a struggle, though. She led 3-0, was pegged back to 4-4 and went to 6-5 before Groth put a mid-court shot into the net. Venus will play Tsvetana Pironkova or Marion Bartoli next and will need to up her game (Pironkova won the first set, 4-4 in the second).”

1.57pm: Groth returns into the net on match point to hand victory to Venus. Patrick Kidd will doubtless tell us all about it shortly. Meanwhile, Roger Federer is 4-2 up on Centre.

1.46pm: Patrick Kidd reports: “I’ve been on Court 2 watching Venus Williams against Jarmila Groth. She’s not been at her best today, has Miss V, with too many shots ballooning some way over the baseline (doesn’t know her own strength, I reckon). Venus won the first set 6-4, but suffered an early break in the second and it took her to the tenth game before she could break back to 30. However, she has just been broken back in the eleventh and Groth, who squandered one break point in that game before winning after Williams hit long, will be serving for the set.

“She should be doing much better against the world No 92, but Groth is in a purple patch, who is more than holding her own in the rallies. She reached the fourth round at Roland Garros as well, that time having entered as a wild card, and will see her ranking go to at least No 80 after this run (she could crack the top 60 if she beats Venus). She has never beaten a top 30 player in her career, though, so if she could sneak this it would be an enormous coup.”

1.40pm: Henin’s taken the first set against Clijsters 6-2.

1.39pm: Team Flemski are being beaten by the Bryan brothers, as might be expected, but it’s not the trouncing you might have predicted - they’re 6-2 6-4 5-4 down.

1.36pm: Game and first set Federer, 6-2. Justine Henin is now serving for the first set on Court No 1, leading Kim Clijsters 5-2.

1.32pm: Patrick Kidd is not only the king of statistics, but also star-spotting: “OK, Royal Box watchers, who is in the comfy seats today? We have a double dose of royalty in the form of the Duke of Kent and the Duchess of Gloucester. There is also Francesco Ricci Bitti (whose name sounds like a child asking for a biscuit but is president of the International Tennis Federation), Sir Roger Bannister (four-minute mile and all that), John Barclay (former Sussex cricket captain and president of MCC), Neale Fraser (the 1960 Wimbledon champion back for his 50th anniversary), Budge Patty (the 1950 men’s Wimbledon champion), Ian Hislop, Sir Trevor McDonald and ... wait for it... 83-year-old crooner Tony Bennett. He left his heart in San Francisco, his left hip in Seattle and his wallet in the back of a cab in Paris.” Fraser and Patty were both there on Saturday as well.

1.26pm: Official Wimbledon Twitter tells us that Henin now “leads 4-1. Henin having treatment on right forearm after awkward fall while volleying.”

1.23pm: Patrick Kidd writes, with reference to my comment at 1pm: “Sue Barker is right to be surprised that Federer and Melzer have never played each other, but not because they are from adjacent countries. It’s because they are pretty long in the tooth (28 and 29 respectively). Between them they have played almost 1,000 games of tennis, yet the draw has never thrown them together. They are connected in one way that is worth noting, though, which is that they have both won Wimbledon. The boys’ title, that is. Federer was boys’ champion here in 1998 and Melzer a year later.” You are the king of statistics today, Mr Kidd, good work.

1.20pm: Bit of news from Junior Wimbledon - : Lewis Burton of Great Britain has beaten Mathias Bourgue of France in straight sets, 6-4 6-4.

1.16pm: Justine Henin is two games up against Kim Clijsters already, and Jarmila Groth has broken Venus in the second set. On Court No 18, the official court of crazy, Na Li has beaten Agnieszka Radwanska 6-3 6-2.

1.13pm: Federer breaks Melzer. I have a feeling we might see the clinical version of Federer today, not the slow starter who’s been mooching around this Wimbledon.

1.11pm: And the Clijsters v Henin showdown is under way too.

1.10pm: First game to Federer. It’s blazing sun out there today - gorgeous for those of us who fancy a spot of sunbathing, probably not great for those of us who are playing tennis.

1.04pm: Official Wimbledon Twitter reports: “Jankovic retires trailing Zvonareva 1-6 0-3. Mrs Jankovic comforts her courtside. Sad for the No.4 seed.” Seems to be a problem with her lower back.

1pm: Sue Barker has just said: “Jurgen is from Austria, Roger is from Switzerland, and yet this is their first meeting. I can’t believe it!” What, because their countries are near each other that should affect their draw in tournaments?

12.55pm: Venus takes the first set. And now we’re off to Centre Court for what should be a great day’s play.

12.45pm: Afternoon, all - Carrie here to take you through to close of play this evening. Just catching up with what’s going on round SW19 this morning, and I note that Venus Williams is at 4-4 in the first set against Jarmila Groth. Intriguing. Our first match on Centre Court begins in ten minutes or so, and it’s Roger Federer beginning play against Jurgen Melzer.

Meantime, Patrick Kidd is still pondering the importance of serve. He writes: “Holding your serve is not everything at Wimbledon, as Nicolas Mahut, who held 89 service games out of 91 but still lost in the first round, knows, but it certainly helps. In which case, Andy Murray’s service form this tournament is cause for optimism. He has served 42 times and been broken only once. The only players, apart from Mahut, with a record to match that are Andy Roddick (53 saves out of 54) and Robin Soderling, who has a 100 per cent record of 43 service games out of 43.

“Soderling doesn’t hit many aces, relatively, with an average of one per game (Murray has hit 50 in 42 games, while Roddick has 66 in 54) and his first service percentage is relatively low at 63 per cent, but he has a knack of winning the points and is advancing quietly through the bottom of the draw. He should have too much for David Ferrer, whom he meets third on Court 12 today.”

12.10pm: Patrick Kidd is also at the All England Club. He writes: “Shock news for those who think that Serena is the bigger hitting of the Williams sisters. I’ve just seen the stats from the first week of the tournament and not only has Venus hit the fastest serve of all women, but her best of 128mph, hit during her third-round match, is 7mph faster than Serena’s best. Venus is starting shortly on Court 2 against Jarmila Groth.

“It is almost fast enough to put Venus among the elite men. She would need to hit 134mph to get into the top 20 on the men’s table, which is topped by Taylor Dent, of the US, who hit 148mph during his second-round match. John Isner had a 143mph hit during his marathon opener. Andy Murray is in tenth place on 137mph.

11.49am: Julian Muscat, part of our team at the All England Club, writes: A great many of the questions raised during the first week are set to be answered today. All surviving men and women are in action. Can Federer raise his ordinary form to cope with Austria’s Melzer, a dangerous left-hander who, until he reached the French Open semi-finals last month, threatened to leave his prodigious talent unfulfilled? And what of Nadal’s suspect knees? Despite what he says in his blog, there’s no doubt his movement was impeded towards the end of his win over Philipp Petzschner.

Aficionados will tune into the joust between Djokovic and a revived Hewitt - who beat Federer on grass in the final at Halle two weeks ago. Murray, for his part, confronts a big-serving opponent ahead of a possible quarter-final against big-serving Robin Soderling. He’ll enjoy the symmetry.

11.40am: It will not be easy for Querrey, though, given that Murray will not only count on vociferous support but looks in good form, having won each of his previous games in the tournament in three sets. “The start has been very good, and something that I needed for the confidence,” the Scot said. “I’m going to have to play better if I want to go all the way.”

11.38am: Mind you, Querrey doesn’t seem to be getting that much support back home in the US, either. The American, who beat Xavier Malisse in an entertaining five-set match in the last round, said: “I don’t think [my] match was televised. I mean, I know it wasn’t. So no one even knows what happened out there on Court 1 besides, like, my family.”

11.30am: Querrey has pointed out that not everybody on Centre Court will be cheering for Murray. “I think it’ll be 99 per cent for Murray and, like, my mom and dad and sister cheering for me,” he said. He will not take the bias personally, though. “You hear them them cheering for the other guy, and you assume they like the other guy. They don’t dislike you. They like both players. They just like him a little more.

Querrey is playing in the second week at Wimbledon for the first time but demonstrated his pedigree at Queen’s. “I felt good on the grass last year,” he said. “This year I’m feeling even better. After my first few rounds at the Queen’s Club, I felt great on the grass. I’m still feeling great on it.”

11.15am: Rafa also took the opportunity to reassure fans that he will be fit for his match on Court One today against Paul-Henri Mathieu, even though our columnist had to call a trainer to the court during his five-set victory on Saturday. That led to suggestions that the Spaniard was suffering familiar problems with his knees, but he says: “Got some questions after my practice about my knee. It’s feeling better and I expect to be ready to play.

“I have always been a very fair player and when I called the trainer I really needed him since I was in pain. I know there has been some controversy because of that but I don’t think it is fair. Like it was not fair the way the umpire gave me a warning for coaching. I am normally not commenting these things but I feel it was important to tell you about it.”

11am: Writing in his Times blog, Rafael Nadal has offered his commiserations to England fans and joined the debate about whether football should use video technology similar to that employed so successfully in tennis. He says: “Hope you guys are OK. I am sorry (I really am) for England’s defeat at the World Cup. I did mention here and at Wimbledon that I really likes this team. I think it has been very unfortunate what happened. I mean that mistake from the linesman and the referee is something unbelievable. I don’t understand why there is no way in football to have the 4th referee looking at a screen and saying to the main one what is going on. Just like the Hawk-Eye in tennis. Very simple, very easy.”

10am: Good morning and welcome to our live coverage of what promises to be an intriguing day at Wimbledon.

For those fans trying to put behind them a certain result in Bloemfontein, the most important fixture features Andy Murray against Sam Querrey, the talented American, on Centre Court.

The British No 1 impressed last week at the All England Club but the unseeded Querrey showed at the AEGON Championships earlier this month that he is in good form and provides difficult opposition on grass.

Before them on Centre Court, Roger Federer will continue the defence of his title against Jurgen Melzer before Serena Williams and Maria Sharapova reprise their 2004 final in potentially the most exciting women’s tie of the day.

They could face competition for that status, however, on Court One where Kim Clijsters meets Justin Henin. Rafael Nadal is due to play in the same arena, taking a break from writing his brilliant Times blog to take on Paul-Henri Mathieu.

With files from our correspondents in SW19, we’ll be providing updates on each match, plus news, views, images and tidbits from around the courts. The action starts on the show courts at 1pm but elsewhere at noon. Stay with us.