Andy Murray overcame some poor serving to defeat Alex Bogomolov in the first round of the 2012 U.S. Open on Monday.

Murray landed just 49 percent of his first serves, but still defeated the 73rd-ranked Russian in straight sets, 6-2 6-4 6-1.

Fresh off his gold medal performance at the London Games, Murray committed 39 unforced errors, and didn't quite seem himself. It was a humid day in New York, and Murray complained of cramps.

"I didn't serve very well but I only lost seven games in three sets so I must have done something well," Murray said. "I played fairly well from the back of the court. I just would have liked to have served a bit better."

The Scot rated his effort as a "six or seven out of 10."

Murray's second-round opponent will be Croatian Ivan Dodig. The 27-year-old is ranked No. 118, and is coming off a straight-set victory over Hiroki Moriya.

Thomaz Bellucci, Pablo Andujar, Robin Haase, and No.31 Feliciano Lopez are potential third-round opponents for Murray should he advance.