No. 3 Roger Federer returns the ball to No. 14 Stanislas Wawrinka during their fourth round match at the French Open tennis championship at the Roland Garros stadium, on May 29, 2011, in Paris. Federer won in straight sets, 6-3, 6-3, 7-5. Federer notched 8 aces and 32 winners in the match.

Stanislas Wawrinka returns the ball to fellow countryman Roger Federer during their fourth round match at the French Open. Wawrinka could only muster 19 winners in the loss and only had two break opportunites (converting on one).

Russia's Anastasia Pavlyuchenkova reacts after upsetting No. 3 Vera Zvonareva during their fourth round match at the French Open. Pavlyuchenkova won in three sets, 7-6 (7-4), 2-6, 6-2. She had 41 unforced errors but also tallied 45 winners in the win.

No. 3 Vera Zvonareva hits a return to Anastasia Pavlyuchenkova during their fourth round match at the French Open. Zvonareva, who lost in three sets, was the highest seed remaining in the women's draw.

No. 2 Novak Djokovic celebrates his win over No. 13 Richard Gasquet in the fourth round of the French Open. Djokovic won in straight sets, 6-4, 6-4, 6-2. It was his 43rd consecutive win, which is the third longest ever.

No. 13 Richard Gasquet stretches to hit a backhand during his fourth round match against Novak Djokovic during Day 8 of the French Open. Gasquet failed to break his opponent at all during the match.

No. 5 Francesca Schiavone kisses the ground after defeating No. 10 Jelena Jankovic during their fourth round match at the French Open. Schiavone won in three sets, 6-3, 2-6, 6-4.

No. 10 Jelena Jankovic hits a forehand during her fourth round match against No. 5 Francesca Schiavone. Jankovic registered 41 unforced errors and only 23 winners.

No. 9 Gael Monfils reacts after a point against No. 7 David Ferrer during their fourth round match at the French Open. Monfils leads the match, 6-4, 2-6, 7-5, but Ferrer was up 2-0 in the fourth set when the match was suspended due to darkness.

No. 7 David Ferrer reacts after a point against Gael Monfils during their fourth round match at the French Open. Ferrer trails two sets to one, but was up 2-0 in the fourth before the match was suspended due to darkness.

No. 13 Svetlana Kuznetsova returns a shot to No. 28 Daniela Hantuchova during their fourth round match at the French Open. Kuznetsova won in three sets, 6-7 (6-8), 6-3, 6-2.

No. 28 Daniela Hantuchova serves against No. 13 Svetlana Kuznetsova during the fourth round of the French Open. Hantuchova was able to take the first set, but dropped the next two.

No. 11 Marion Bartoli hits a return to Gisela Dulko during their fourth round match at the French Open. Bartoli took the first set, 7-5, before Dulko retired after falling behind 1-0 in the second.

Gisela Dulko hits a return to Marion Bartoli during their fourth round match at the French Open. Dulko was forced to retire in the second set due to a leg injury. She received treatment on her left leg during the first set and continued playing. But it was too much to overcome in the second.

Fabio Fognini reacts after he defeats Albert Montanes in their fourth round match at the French Open tennis championship at the Roland Garros stadium. Fognini won in five sets, 4-6, 6-4, 3-6, 6-3, 11-9.

Albert Montanes hits a return to Fabio Fognini during their fourth round match at the French Open. Montanes fell in five sets as he couldn't take advantage of Fognini's 103 unforced errors.