Tommy Robredo of Spain celebrates a point against Michael Llodra of France during the U.S. Open on Sunday in New York.

Michael Llodra of France, center, talks with a trainer during his match with Tommy Robredo of Spain at the U.S. Open on Sunday. Llodra later retired from the match.

Andy Murray serves against Stanislas Wawrinka. Murray was ousted early from the U.S. Open for the second-straight year.

Stanislas Wawrinka celebrates his win against Andy Murray. The Swiss player stunned the U.S. Open's No. 4 seed, 6-7(3), 7-6(4), 6-3, 6-3, on Sunday, Sept. 5.

Venus Williams celebrates defeating Israel's Shahar Peer in the fourth round of the U.S. Open in New York on Sept. 5, 2010. She won the match 7-6 (7-3), 6-3.

Shahar Peer from Israel reacts against Venus Williams during their U.S. Open match. Peer had no aces and three double faults in the match.

Venus Williams returns a shot against Shahar Peer during her fourth round matchup. Williams notched 28 winners and six aces in the match.

Rafael Nadal of Spain returns a shot against Gilles Simon of France. Nadal defeated Simon 6-4, 6-4, 6-2.

Gilles Simon of France reacts after a point played against Rafael Nadal of Spain. Simon lost the match in straight sets.

Serena Williams watches as her sister Venus returns a shot against Shahar Peer. Williams had to withdraw from the U.S. Open before it began due to an injury.

Shahar Peer serves against Venus Williams. Peer was unable to record any aces in the match.

Sam Querrey of the United States returns a shot to Nicolas Almagro during a third round match. Querrey dominated in the serve game with 19 aces to Almagro's three.

No. 2 seed Kim Clijsters from Belgium reacts after winning her match against Ana Ivanovic from Serbia. She won the match, 6-2, 6-1. Clijsters had two aces and 16 winners in the win.

Ana Ivanovic returns a shot against Kim Clijsters. Ivanovic was playing some of her best tennis in the last few years, but she fell to an equally hot Clijsters.

No. 8 seed Fernando Verdasco of Spain returns to David Nalbandian of Argentina. Verdasco won the match in four sets, 6-2, 3-6, 6-3, 6-2.

David Nalbandian of Argentina serves against Fernando Verdasco of Spain during his men's singles match. Nalbandian put up a good fight but fell in four sets.

No. 6 seed Francesca Schiavone of Italy returns a shot to No. 20 seed Anastasia Pavlyuchenkova of Russia. Schiavone won the match, 6-3, 6-0.

No. 20 seed Anastasia Pavlyuchenkova of Russia returns a shot to No. 6 seed Francesca Schiavone.

David Ferrer returns a shot against Daniel Gimeno-Traver of Spain on Day 7 of the U.S. Open. Ferrer won in straight sets, 7-6 (7-2), 6-2, 6-2.