Shelton on Monfils: "He has more energy than he shows".

Ben Shelton took advantage of Gaël Monfils' withdrawal in the fourth set to reach the quarter-finals of the US Open.

At the press conference, he was asked about Monfils. The American declared: "It's always difficult. The little boy in me wants to see Gaël win.

It's like players get upset when the public is against them or for them, but today, all I could do was appreciate the fans' support.

It was a great moment for me to be part of it.

Obviously, almost the whole stadium was against me, but it's something that gives you goose bumps and makes you feel alive.

He's a player who takes you into a game where you smile and then you're surprised to be two sets down. You have to stay focused when you play him.

He's a very complex player who changes constantly. It's his way of dealing with fatigue on the court, but sometimes he exaggerates.

I think he has more energy than he shows. Even if that wasn't the case today towards the end of the match."