Un Temps Pour Tout made all the running under James Reveley to take Grade One glory in the Grande Course de Haies d'Auteuil in Paris.
The David Pipe-trained six-year-old enjoyed the run of the race from the front and won unchallenged from the Willie Mullins-trained Thousand Stars.
The grey stayed on well from the rear to claim the runner-up spot in the race known as the French Champion Hurdle in the hands of Katie Walsh.
Sam Twiston-Davies steered Zarkandar into third place for trainer Paul Nicholls, with Dos Santos first of the home contingent in fourth.
Un Temps Pour Tout's stablemate Ballynagour was fifth, with Hurricane Fly sixth after never looking like adding to his 22 victories at the highest level.
Pipe said: "It was a fantastic race. Horse and jockey were very brave and galloped all the way to the line. Ballynagour ran well and finished fifth, but the trip was probably better for Un Temps Pour Tout than it was for him."
Thousand Stars has become an Auteuil regular, winning four times on his various visits and running creditably on other occasions.
Mullins' son and assistant Patrick said: "He seems to keep his best form now for Auteuil in May and June. He's a credit to the yard and he's a remarkable horse at 11 years of age."
However, Mullins junior felt Hurricane Fly was never at home on the Paris course on his first run there for seven years.
He added: "I thought you could tell after the first hurdle that he didn't look comfortable. He finished sixth so he got some prize money. We'll give him his holidays now and he'll come back in training next year and we'll see how he is then."