French challenger Whipper went one better than 12 months ago with victory in the Group One Prix Maurice de Gheest at Deauville.
Jockey Christophe Soumillon settled the four-year-old at the rear of the field as his stable companion Tycoon's Hill set the pace.
But the favourite made good headway to lead inside the final furlong.
He managed to hold off the challenge of the David Loder-trained Goodricke with Roger Charlton's Patavellian in third.
Last year's winner Somnus never looked like repeating his success of 12 months ago and was always struggling against the stand rails.