Roger Federer opened his bid for a sixth US Open crown with a comfortable 6-3 6-2 7-5 victory over Grega Zemlja in New York.
"I'm in a good spot right now," Federer said. "I want to enjoy it as long as it lasts. Clearly, when you win everything, it's fun. That doesn't necessarily mean you love the game more. You just like winning, being on the front page, lifting trophies, doing comfortable press conferences. It's nice. But that doesn't mean you really, actually love it, love it.
"That maybe shines through maybe more in times when you don't play that well. For me, I knew it - winning or losing, practice court or match court - that I love it."
Top-seeded Novak Djokovic saved seven of eight break points to start with a 6-1, 6-2, 6-2 victory over former junior world No. 1, Ricardas Berankis of Lithuania. The victory took only 82 minutes for Djokovic, seeking his second title and fourth straight final at Flushing Meadows. It was a quiet evening at Arthur Ashe Stadium, where the packed crowd barely cheered during the most routine of matches.
One of the few exciting moments came on the first point of the third set, when Djokovic lobbed Berankis and Berankis replied with a backward shot between his legs that Djokovic calmly flicked away for a volley winner. He hit 28 winners, with only nine unforced errors. "I played every point like it's a match point," Djokovic said.
No. 5 Tomas Berdych and No. 10 Milos Raonic also picked up straight-set victories. Wimbledon semi-finalist Jerzy Janowicz was beaten 6-4 6-4 6-2 by Mario Gomez. Sam Querrey saw off Guido Pella 7-6(3) 4-6 6-1 6-2, but 25th seed Grigor Dmitrov suffered a 3-6 6-3 6-4 5-7 6-2 defeat to Joao Sousa.
John Isner needed little over an hour to dispatch Filippo Volandri 6-0 6-3 6-2 and book his space in the second round. Milos Raonic enjoyed a straight sets win over Thomas Fabbiano to set up a second round tie with Pablo Andujar.