US Open singles results (in pics)

New York, USA

Andy Murray of Britain reacts after the first round in the US Open tournament.

New York, USA

Novak Djokovic, of Serbia, reacts after defeating Ricardas Berankis, of Lithuania, in a first round of the U.S. Open tennis tournament.

New York, USA

Anna Schmiedlova, of Slovakia, returns a shot against Kaia Kanepi, of Estonia, during the second round of the 2013 U.S. Open tennis tournament.

New York, USA

Jelena Jankovic, of Serbia, returns a shot against Alisa Kleybanova, of Russia, during the second round of the 2013 U.S. Open tennis tournament.

New York, USA

Jie Zheng of China returns a shot to Venus Williams during the second round of the 2013 U.S. Open tennis tournament.

New York, USA

Rafael Nadal, of Spain, returns a shot to Ryan Harrison during the first round of the 2013 U.S. Open tennis tournament.

New York, USA

Serena Williams, of the United States, returns against Francesca Schiavone, of Italy, during the first round of the 2013 U.S. Open tennis tournament.

New York, USA

Somdev Devvarman, of India, returns a shot to Lukas Lacko, of Slovakia, during the first round of the 2013 U.S. Open tennis tournament.

New York, USA

Sorana Cirstea, of Romania, returns a shot against Japan's Krumi Nara during the second round of the 2013 U.S. Open tennis tournament.

New York, USA

Current Wimbledon champion Marion Bartoli, of France, answers questions about her abrupt decision to retire from the tennis during a news conference at a hotel, Sunday, Aug. 25, 2013, in New York, one day before the beginning of the U.S. Open tennis tournament.