China's Li Na came back from a set down to beat Czech Republic's Petra Kvitova 2-6, 6-1, 6-3 to reach her first French Open quarterfinal.
Argentina's Juan Ignacio Fella upstaged Columbia's Alejandro Falla in a five-set thriller to advance to the quarterfinal. After losing two of the first three sets, Chela prevailed in a fourth set tie-breaker before winning the fifth set 6-2.
Defending men's champion Rafael Nadal easily saw off the challenge of Croatia's Ivan Ljubicic to book his place in the quarterfinal.
Nadal signs autographs after his victory against Ljubicic. He will face the winner of the match between Gilles Simon and Robin Soderling for a place in the last four.
An on-court worker measures the height of the net during the game between Chela and Falla. Chela, who came through in five sets, will face either Andy Murray or Victor Troicki
Spain's David Ferrer battled long and hard but local lad Gael Monfils prevailed 8-6 in fifth set. Monfils will face Roger Federer for a place in the semifinal.