No. 3 Andy Murray defeated Russia's Alex Bogomolov, Jr. in straight sets, 6-2, 6-4, 6-1, on Monday afternoon to advance and face Ivan Dodig of Croatia in Round 2. Murray had 31 unforced errors in the game but was rarely challenged by Bogomolov, who managed just one ace in the match and struggled mightily on 2nd serve points.
The big upset of the day came when 19-year-old American Jack Sock beat No. 22 Florian Mayer of Germany, 6-3, 6-2, 3-2. Sock dominated on 2nd serve points and had just 23 unforced errors in the match. He'll face the winner of Blaz Kavcic and Flavio Cipolla in Round 2. It was the second U.S. Open win for the young American, who also won in Round 1 in 2011 before falling to Andy Roddick in Round 2.
7th-seeded Australian Samantha Stosur defeated Croatia's Petra Martic, 6-1, 6-1 on Monday in defense of her 2011 U.S. Open championship.
No. 3 Maria Sharapova easily dispatched Melinda Czink, 6-2, 6-2.
A number of the matches on the first day of the tournament were delayed due to rain.
Native Texan Andy Roddick, the No. 20 seed, will face Ryne Williams on Tuesday in his first match of the tournament.