Aidan O'Brien's Cupid was not disgraced in third as Spadoun (58-10) ran away with the £40,040 Group One Criterium de Saint Cloud (10f) in Paris on Saturday.
Given an energetic ride by Michael Kinane, the Irish raider finished well to get within nine lengths of the winner on a testing track.
Peter Chapple-Hyam's Prix de Conde winner, Bienamado (Richard Hughes), started favourite but could make no impression in second in the big juvenile test.
The Spanish-owned Spadoun made all under Dominique Boeuf and strolled home by six lengths in the final group one race of the French season.
Meanwhile, Kinane has impressed top American trainer, D Wayne Lukas, who has booked the multiple Irish champion for the ride on Time Bandit in the Breeders' Cup Juvenile in Kentucky on Saturday.
The ride in the Churchill Downs feature was originally offered to Laffit Pincay, who turned it down owing to Californian commitments.
Lukas said: "I got an up-close and personal look at his abilities when I saw him work a horse in Ireland.
"He rides very well, which is established, but I had to see it for myself. He's won everywhere and I don't think that we are giving up anything. Where in the manual does it say that an Irish boy can't ride?"
