The Frenchman topped the field of 35 at the Hubside Jumping de Valence in front of grandstands full of enthusiastic crowds.
The American riders are in great form a few weeks before the Tokyo Olympics, winning the feature grand prix classes two weeks in a row.
The first 4* grand prix at Hubside in Saint Tropez, France, saw the only Spanish rider in the field claim victory aboard Legend.
The German riding Amande de B’neville, led the CCI4*-L from beginning to end, wrapping up with a perfect show jumping round.
The only CCI5*-L competition this year closed out with another perfect performance from Laura Collett (GBR) and London 52.
Laura Collett and London 52 remain in the pole position in the CCI5*-L following cross-country with fellow Brit Piggy March a close second.
Laura Collett and London 52 snag the lead in the 5 Étoiles De Pau, closely followed by Christopher Burton (AUS) and Piggy March (GBR).
The Longines Equita Lyon, Concours Hippique International has been reconfigured and will be held with a maximum of 1,000 spectators.
The Brazilian aboard VDL Edgar M dominated the class and won the first 5* grand prix of his career - which was also the only 5* on the planet in August.
The Scottish rider won the Hubside Jumping de Grimaud feature for the second time - this time aboard Hello Jefferson - ahead of Edward Levy and Jos Verlooy.