British number one Cameron Norrie reached the US Open fourth round for the first time with a composed victory over Denmark's 28th seed Holger Rune.
Norrie maintained focus to win 7-5 6-4 6-1 after Rune, 19, complained the Briton was taking too much time to serve by aborting his ball toss.
Seventh seed Norrie plays Russian ninth seed Andrey Rublev in the last 16.
Dan Evans could not join him after a 7-6 (13-11) 6-7 (3-7) 6-2 7-5 loss in four hours to 15th seed Marin Cilic.
"It is nice to be through in straight sets and not really playing my best tennis leading in to it," said Norrie, who has not dropped a set this week.