Jack Draper was at his best to scaled through the fourth round of the US Open as he defeated American wildcard Michael Mmoh at the USTA Billie Jean King National Tennis Center in New York on Saturday evening. Draper sealed a comfortable 6-4, 6-2, 3-6, 6-3 to move into the last 16 of the US Open Draper, ranked No 123, will play the winner of the match between Frenchman Arthur Rinderknech and…