British No. 1 Jack Draper has pulled out of the US Open after experiencing discomfort in his left arm, the player and tournament representatives confirmed late Wednesday in New York. The 23-year-old, who reached the semi-finals at Flushing Meadows last year, had edged through his opening match on Monday but said the injury left him unable to continue. Belgian qualifier Zizou Bergs moves into the third round by walkover. Draper’s exit leaves the men’s singles draw without last year’s surprise semifinalist and further thins British interest in the tournament. Earlier in the day, Katie Boulter lost her opening match in straight sets, while Sonay Kartal fell in three sets to Brazil’s Beatriz Haddad Maia. No British players remain in the singles competitions.