Headman proved his class once more for Roger Charlton in Saint-cloud on Sunday, continuing the fine form for sire Kingman of late.
Smashing winner of the London Gold Cup at Newbury on Lockinge Day, he has converted his juvenile promise into now solid three-year-old form, taking his first victory at Group level - the Prix Eugene Adam over 1m2f.
Jason Watson waited with his mount in the second trio, and with the pace on and off, the jockey then took no chances by delivering his mount early on the wide outside with two furlongs to go.
Driven out, he asserted quickly with 200 yards remaining, and won by a comfortable three-length margin over Charlie Appleby's Jalmoud.