One of the best returners of serve, if not the best, in tennis history just couldn't find the answers to win one of the Frenchman's service games.
After not having a break point against Mpetshi Perricard's massive delivery in the opening set - with a break by the home favourite at 5-5 helping him become the first French player to win a set against Djokovic in Paris in 14 years - Djokovic was zero-for-nine after nearly 12 completed games in the second set.
Emphasis on the nearly. After Mpetshi Perricard saved three set points at 5-6 with aces, he couldn't see off a fourth. Djokovic returned the serve on that key point, and won a 17-shot rally to, finally, equal the scoreboard.
He opened the point up with a delicate drop shot, and though the 6ft 7in Mpetshi Perricard raced forward admirably to retrieve it, he fired his forehand passing attempt just wide to lose the game.