Old rivals Sizing Europe and Big Zeb clash again in the Boylesports.com Champion Chase at Punchestown on day one of the five-day festival.
Trainer Colm Murphy is keen for Big Zeb to have another crack at Sizing Europe, having filled the runner-up spot to him in the Cheltenham equivalent in March - a race he won last year.
"He came out of the Queen Mother well. It's 1-1 at the minute and we are hoping we come out on top this time," said Murphy.
Star Australian import So You Think made a scintillating winning European debut for Aidan O'Brien at the Curragh yesterday.