Roger Federer launched his bid for an 18th grand slam title with a workmanlike 6-3, 6-4, 7-6 win over Marinko Matosevic to ease into the second round of the US Open.
A five-time US Open champion, Federer never appeared threatened by Matosevic but the 76th ranked Australian still forced the Swiss maestro to work up a sweat in front of an enthusiastic centre court crowd.
In the other matches, 10th-seed Kei Nishikori of Japan, 13th-seeded American John Isner and 25th seed Ivo Karlovic of Croatia were among first-round winners.
Nishikori shrugged off a recent toe injury to dismiss American wild card Wayne Odesnik, while Isner ousted compatriot Marcos Giron and Karlovic eliminated Jarkko Nieminen of Finland.
Although five of eight US men in action were eliminated, Sam Querrey gave local fans something to celebrate with a 6-2, 4-6, 6-4, 4-6, 6-3 win over Maximo Gonzalez of Argentina.
Other results (selected):
David Ferrer (Spain) beat Damir Dzumhur (Bosnia and Herzegovina) 6-1, 6-2, 2-6, 6-2
Gilles Simon (France) beat Radu Albot (Moldova) 6-3 6-4 6-2
Gael Monfils (France) beat Jared Donaldson (U.S.) 6-4 6-2 6-4
Richard Gasquet (France) beat Denis Istomin (Uzbekistan) 7-5 7-6 6-4
Jan-Lennard Struff (Germany) beat Mikhail Kukushkin (Kazakhstan) 2-6 3-6 6-3 6-3 7-5
Borna Coric (Croatia) beat 29-Lukas Rosol (Czech Republic) 6-4 6-1 6-2
John Isner (US) beat Marcos Giron (US) 7-6 6-2 7-6
Kei Nishikori (Japan) beat Wayne Odesnik (U.S.) 6-2 6-4 6-2
Bernard Tomic (Australia) beat Dustin Brown (Germany) 7-6 6-4 7-6