A fascinating renewal of the High Chaparral EBF Mooresbridge Stakes is the highlight at the Curragh, with the returning Camelot taking on Parish Hall.
The outstanding three-year-old of last year, Camelot won the 2000 Guineas, Derby and Irish Derby and was only just denied a triple crown in the St Leger before signing off with seventh in the Arc.
Aidan O'Brien's colt has to give 5lb to Parish Hall on his return, which won't be easy, as Jim Bolger's former Dewhurst hero won a Listed contest on his first run since that 2011 victory and has fitness on his side.
The Canford Cliffs EBF Athasi Stakes is the other Group Three on the card and sees Viztoria make her return to action.
A dominant winner over Snow Queen in a Listed race here in September, she just missed out against the boys at Maisons-Laffitte and could be the pick of the three-year-olds in this.
Ralph Beckett's Moonstone Magic, not seen since last year's 1000 Guineas at Newmarket, could prove the pick of her older rivals.
Sruthan and Pop Art bid to follow up debut successes in the Power EBF Tetrarch Stakes.
The pair have plenty to do with O'Brien's Fortify and the Bolger-trained Tobann in the field, while Big Whiskey was impressive enough when scoring at Naas last month.
The meeting gets under way at 2.15 with the Alfred Nobel EBF Race, where O'Brien runs his Leopardstown second Michaelmas against four newcomers.
While race experience may give him the edge, Bolger again opposes with Bru Mor, while Supernatural fetched 72,000 guineas as a yearling so will be expected to be smart enough.
Sherzam looks to have Wannabe Better and Illustrate to contend with when attempting to open his account in the PG Duffy & Sons Citroen Maiden, while the Newbridge Credit Union Handicap could be between Core Element and Winning Impact.