Star Aussie sprinter Sea Siren makes her debut for Aidan O'Brien in the Belgrave Stakes at Fairyhouse.
A triple Group One winner Down Under, the mare managed only eighth in the Diamond Jubilee at Royal Ascot, since when the Coolmore team have switched her to the Ballydoyle trainer.
It will be disappointing if she can't see off her rivals in this Listed heat, although Russian Soul hit top gear late on to take second behind Slade Power at the Curragh, and Boston Rocker is interesting in receipt of weight.
Majestic Jasmine broke through with an authoritative success at Tipperary and is one of several potentially progressive contenders for the Follow Fairyhouse On Facebook Rated Race.
John Oxx's filly crosses swords with fellow last-start winners Daymooma and Manhattan Swing, while Jazz Girl bounced back to form over course and distance but will do well to concede weight to the three-year-olds.
Grade One-winning hurdler Hisaabaat lost his way in that sphere last season and Dermot Weld tries him back on the level in the Fairyhouse Sunday Market Handicap.
Colour Blue emerged from Group Three company with her reputation enhanced at the Curragh and drops back in class for the Irish Stallion Farms EBF Median Auction Maiden, which gets the action under way at 2.35.
Via Ballycroy atoned for a Curragh defeat when backing up quickly to justify favouritism at Leopardstown, and she should be on the premises in the Fairyhouse Members Trip Handicap.
Elusive Express couldn't quite supplement a Bellewstown victory when turned out at Roscommon just three days later, but she isn't resting on her laurels and is sent back to the well, this time in the Children Under 18 Are Free Handicap.
Heuston offered promise when second on his Dundalk debut last year and finally makes his second appearance in the Irish Stallion Farms EBF Maiden.