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 won 7-5 6-4 6-1 against the 19-year-old, who complained about the time the Briton was taking to serve by aborting his ball toss.
After being distracted, Rune won one more game as Norrie maintained focus.
Seventh seed Norrie, 27, will next play Russian ninth seed Andrey Rublev or Canadian 19th seed Denis Shapovalov.
"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.