Second seed and five-time champion Roger Federer, 37, made it 18 wins in 18 second round appearances in New York by seeing off error-plagued Frenchman Benoit Paire 7-5, 6-4, 6-4
Roger Federer Thursday set-up a US Open third round clash against Nick Kyrgios who found himself at the centre of an impartiality row after an umpire climbed down from his chair to tell him: "I want to help you".
Second seed and five-time champion Federer, 37, made it 18 wins in 18 second round appearances in New York by seeing off error-plagued Frenchman Benoit Paire 7-5, 6-4, 6-4.
Also going through were Wimbledon champion and two-time US Open winner Novak Djokovic as well as Maria Sharapova, the 2006 champion in New York.
However, women's second seed Caroline Wozniacki was knocked out by Lesia Tsurenko of the Ukraine.
Kyrgios reached the third round by seeing off France's Pierre-Hugues Herbert 4-6, 7-6 (8/6), 6-3, 6-0.
The match created a huge storm after respected umpire Mohamed Lahyani lost patience with the under-performing 30th seed and climbed down from his chair to tell the Australian, trailing by a set and 3-0, to try harder.
A furious Herbert said Lahyani had over-stepped the mark.
Kyrgios, however, played down the incident.
US Open chiefs didn't help matters by claiming Lahyani was forced to step from his chair as the crowd noise meant that Kyrgios could not hear him.
Djokovic downed Tennys Sandgren of the United States 6-1, 6-3, 6-7 (2/7), 6-2.
Angelique Kerber survives. The No.4 seed defeats Johanna Larsson 62 57 64 to move into 3R to play Dominika Cibulkova. AK looked absolutely gassed in the final set but battles through. #USOpen— WTA Insider (@WTA_insider) August 30, 2018
Next up for sixth seed Djokovic is Richard Gasquet of France who he has beaten 12 times in 13 meetings.
German third seed Alexander Zverev made the third round for the first time in four tries after a 6-4, 6-4, 6-2 victory over lucky loser Nicolas Mahut.
Australian Open champion Wozniacki went down 6-4, 6-2 to world No 36 Tsurenko who claimed a second top 10 win this month having also defeated Garbine Muguruza in Cincinnati.
She lost in the fourth round at Roland Garros and exited in the second round at Wimbledon.
She follows top seed Simona Halep, a first round loser, out of the tournament.
Sharapova took her night time record at the tournament to 21 wins in 21 matches with a 6-2, 7-5 win over Sorana Cirstea of Romania.
The Russian, who committed 33 unforced errors, next faces 2017 French Open champion Jelena Ostapenko.
Wimbledon champion Angelique Kerber kept her bid for a second US Open title on track, outlasting Sweden's Johanna Larsson 6-2, 5-7, 6-4.
Kerber will next take on Dominika Cibulkova after the Slovakian beat Taiwan's Hsieh Su-Wei 7-6 (7/3), 4-6, 6-4 despite being docked two points for returning late from a heat break.
Belarus 26th seed Aryna Sabalenka continued her red-hot summer by seeing off 2010 runner-up Vera Zvonareva 6-3, 7-6 (9/7).
Sabalenka, who won the New Haven tournament last week and reached the semi-finals in Cincinnati, has made the third round of a Slam for the first time.