Cirrus Des Aigles turned in a masterclass from the front to gamely account for Olympic Glory in the Prix d'Ispahan at Longchamp.
In what was billed as a clash between the alleged big two, the Richard Hannon-trained Olympic Glory could finish only fourth under Frankie Dettori.
Cirrus Des Aigles had defeated Arc winner Treve on his last start, but this time made virtually every yard of the running in the hands of Christophe Soumillon.
The Corine Barande-Barbe-trained eight-year-old was pressed by the revitalised Anodin, but Soumillon had far too much class beneath him and eased home inside the final 100 yards.
Pollyana finished third, while Olympic Glory was hard at work a couple of furlongs from home on his first try over nine furlongs and folded meekly late on.