American bizarrely hears hometown fans cheering on his French opponent.
John Isner booked his place in the US Open third round for the fifth consecutive year after he defeated Gael Monfils at Flushing Meadows.
But it not go all his way as the 13th seeded American had to contend with the mercurial Frenchman and the American crowd that often chanted “Let’s go Monfils” late in the third set.
But it did not have any impact on the game as the highest ranked American man at the tournament moved through to the next round 7-5, 6-2, 4-6, 7-6.
Isner said he was not surprised the American audience cheered for his opponent, saying his style of play makes every match unpredictable.
“He’s a very fun-loving guy, and he gets cheered on wherever he goes, not just in France. He’s one of the most exciting tennis players in the world, hands down,” Isner said.
“He’s been fighting a bunch of injuries, so it’s good to see him back healthy.”
Isner will now face another tough test in the form of 22nd seed Phillpp Kohlschreiber, who moved through to the third round after winning in four sets against Edouard Roger-Vasselin.