French Open: Round four (20 images)

Russian Vera Zvonareva falls to the court after losing a point during her French Open womens fourth round match against Russian Anastasia Pavlyuchenkova at Roland Garros in Paris on May 29, 2011. Pavlyuchenkova defeated Zvonareva 7-6 (4), 2-6, 6-2 to advance to the quarterfinals. UPI/David Silpa

Roger Federer of Switzerland hits a shot during his French Open mens fourth round match against Stanislas Wawrinka of Switzerland at Roland Garros in Paris on May 29, 2011. Federer defeated Wawrinka 6-3, 6-2, 7-5 to advance to the quarterfinals. UPI/David Silpa

Italian Fabio Fognini reacts after a shot during his French Open mens fourth round match against Spaniard Albert Montanes at Roland Garros in Paris on May 29, 2011. Fognini defeated Montanes 4-6, 6-4, 3-6, 6-3,11-9 to advance to the quarterfinals. UPI/David Silpa

Jelena Jankovic of Serbia hits a shot during her French Open womens fourth round match against Italian Francesca Schiavone at Roland Garros in Paris on May 29, 2011. Schiavone defeated Jankovic 6-3, 2-6, 6-4 to advance to the quarterfinals. UPI/David Silpa