There is a photo of a boat in the evening of 08/10 at Saint-Tropez and Phil mentioned boats while talking to the NBA team, so it must be that the racers were there that day/evening.
The resort, which he had already left by the evening of 09/10 has been identified by jessietrey.
It is in Grimaud, a little village right next to Saint-Tropez. It's not in Arles, which I got the impression you think, Peach.
He added a comment with that photo, saying he arrived late the previous night and woke up to that view. So that night must have been the pit stop.
The photo from Arles was posted during the day of 10/10, which would suggest a different leg.