Sea The Stars wins Prix de l'Arc de Triomphe horse race at Guineas . But the Aidan O'Brien-trained Set Sail and Grand Ducal set a blistering pace with the former leading by 15 lengths entering the home straight of the mile and a half ( 2,400 meters ) race . Completes treble after earlier wins in English Derby and 15 Longchamps . French trained horse bursts clear of rivals under jockey Kinane .
Sea The Stars wins Prix de l'Arc de Triomphe horse race at Guineas . Completes treble after earlier wins in English Derby and 15 Longchamps . French trained horse bursts clear of rivals under jockey Kinane .