Golden Horn and Gleneagles head a star field of eight horses declared for the Qipco Irish Champion Stakes at Leopardstown on Saturday, a race that will have an earlier start time due to weather concerns.
The Classic-winning pair were set to meet in the Juddmonte International at York last month, but Gleneagles was a late withdrawal due to the ground while Golden Horn suffered a shock defeat at the hands of Arabian Queen.
The much-awaited showdown between John Gosden's Derby and Eclipse winner Golden Horn and the Aidan O'Brien-trained dual 2000 Guineas scorer Gleneagles is on again - but connections of the latter remain concerned about the ground turning soft.
Gleneagles has not been seen since making it three from three for the year in the St James's Palace Stakes at Royal Ascot.
O'Brien is also represented by Secretariat Stakes winner Highland Reel and top-class filly Found.
Last year's winner The Grey Gatsby is set to defend his crown for Kevin Ryan, while Dermot Weld's Prince of Wales's Stakes hero Free Eagle is another major contender.
Corine Barande-Barbe's French superstar Cirrus Des Aigles and Jim Bolger's Irish 1,000 Guineas and Yorkshire Oaks heroine Pleascach complete a stellar field.
The only withdrawal at the 48-hour final declaration stage was Legatissimo, who goes for the Coolmore Fastnet Rock Matron Stakes on the same card.