Jack Draper has reached the second week of a grand slam for the first time after beating American Michael Mmoh in the third round of the US Open.

The British number four silenced the home crowd with a gritty display in a 6-4 6-2 3-6 6-3 victory.

The Grandstand court at Flushing Meadows is an intimidating place for an overseas player taking on an American, but Draper had almost emptied it when he went 2-0 ahead.

Mmoh, ranked 89 in the world, hit back in the third, but Draper dug deep to break for 4-2 in the fourth before clinching a huge win.

Grandstand is also the court which Draper hurt his hamstring a year ago in his third-round match against Karen Khachanov, forcing him to retire.

The 21-year-old has been beset by injuries ever since and was a doubt to even play in New York due to a tear in his shoulder.

Yet Draper, serving with less vim than usual in a bid to manage the problem, still thumped 52 winners to surge into the last 16.

He said: “It was a tough match, Michael is an incredible player who has had a great year and I knew would be a challenge. I was proud of the way I came through it.

“Last year was really difficult, I injured myself and didn’t want that to happen today. To come it through after a tough year for me, I’m very happy.”

British number one Cameron Norrie tumbled out after a straight-sets defeat to Matteo Arnaldi.

An out-of-sorts Norrie, the 16th seed, was beaten 6-3 6-4 6-3 by the Italian world number 61.