Brown Panther took the Irish St Leger under a brilliant ride from Richard Kingscote, who stole the race from the front.
Roger Varian and Andrea Atzeni clinched their second Group One of the weekend as Cursory Glance took the Moyglare Stud Stakes.
Champions Day at Ascot is the likely next port of call for Australia following his shock defeat at Leopardstown on Saturday.
Criquette Head-Maarek would still like Treve to defend her Arc de Triomphe crown despite meeting defeat in the Prix Vermeille.
Gleneagles further enhanced his reputation with a clear-cut victory Goffs Vincent O'Brien National Stakes at the Curragh.
Freddie Head's Charm Spirit justified her reputation in denying Toronado in the Prix du Moulin at Longchamp.
Kingman's planned outing in the Queen Elizabeth II Stakes at Ascot next month is in jeopardy due to a throat infection.
Ruler Of The World benefited from a fine frontrunning ride from Frankie Dettori as he returned to form in the Prix Foy.
Ectot made an impression on his first start for Al Shaqab Racing when showing a mean turn of foot to win the Prix Niel.
Tarfasha bounced back to winning form with a comfortable win in the Group Two Moyglare 'Jewels' Blandford Stakes at the Curragh.