Frankie Dettori won the Prix Jacques le Marois at Deauville to maintain Palace Pier’s undefeated record.
Dettori, 49, raced in France despite the 14-day quarantine required upon his return to Britain and he will now stay for the Prix Morny on August 23.
The Italian will miss the Ebor Festival in York, which starts on Wednesday.
Dettori and Palace Pier, a three-year-old trained by John Gosden, also won the St James’ Palace Stakes at Royal Ascot in June.
Palace Pier is now undefeated in four career starts.
Jessica Harrington’s Alpine Star finished second in Deauville, and Aidan O’Brien’s Circus Maximus third.
On Saturday, Dettori won the Guillaume D’Ornano Prize over Mishriff.