Aidan O'Brien has won the Irish St Leger five times since 2015
Nine runners are set to contest the all-aged Classic at the Curragh
Recommended bet: Al Riffa to win
Sunday's card at the Curragh is jam-packed with quality, boasting no fewer than four Group 1 races.
The Moyglare Stud Stakes, the Flying Five Stakes and the National Stakes will set the scene ahead of the Comer Group International Irish St Leger at 4.25.
The 1m6f contest differs from the English Leger at Doncaster in that it is open to horses aged three and older, as opposed to being confined to the Classic generation.
A field of nine runners are set to contest the Irish St Leger, with just under €290,000 for the winner.
The latest Irish St Leger odds are available on LiveScore Bet
Al Riffa ready to deliver
Joseph O'Brien rode Order Of St George to win this race for his father in 2015 and now the Piltown-based trainer looks ready to saddle his first winner as a trainer with Al Riffa.
The Wootton Bassett colt has always been held in the highest regard by his trainer.
He won the Group 1 National Stakes on this card in 2022 as a juvenile on soft ground but only managed two runs as a 3YO the following season, second in both instances.
Last year was frustrating to some degree, despite chasing home City Of Troy in the Eclipse at Sandown and winning a Group 1 in Germany after which a tilt at the Prix de l'Arc de Triomphe ended in disappointment.
He was back in Paris for the Prix Ganay in April and was held before finishing second to Rebel's Romance in the Hardwicke at Royal Ascot over 1m4f.
After that, he came here and won the Group 2 Curragh Cup over course and distance by five-lengths in July.
He may now go and fulfil his star potential as a stayer and he can give jockeys' championship leader Dylan Browne McMonagle a welcome Champions Weekend winner.
The latest Irish St Leger odds are available on LiveScore Bet
Leinster could land minor rewards
Aidan O'Brien's main hope is Illinois, second in the Goodwood Cup last time out but perhaps not sure to find this enough of a stamina test.
Unbeaten three-year-old Amiloc is intriguing for Ralph Beckett after his win in the King Edward VII Stakes at Royal Ascot in June.
He's up in class/trip now and taking on older horse in his attempt to become the first 3YO winner of this race since Search For A Song in 2019.
With nine runners and three places to aim at, Joseph O'Brien's other course and distance winner Leinster isn't crossed off in haste.
The Camelot gelding stays further and handles soft ground, but he was a ready winner of last month's trial over course and distance, coming clear of the re-opposing runner-up Dallas Star.
More is needed as Browne McMonagle deserts him for Al Riffa but Billy Lee is an able deputy and perhaps the four-year-old can make the frame at a price on what could be a big afternoon for the yard.
Next Best: Leinster each-way @ 20/1
The latest Irish St Leger odds are available on LiveScore Bet
