Although Alexander Zverev may have double faulted to give the second set to Brandon Nakashima on Wednesday but he was not worried. The No. 5 seed is feeling confident about his 7-5, 6-7 (8), 6-3, 6-1 victory over the 19-year-old American in the second round.
"Not worried," he told US Open press. "Obviously I didn't want to lose the second set, but I know that if I play my game I can still win. So it was one set all, everything was still open."