Venus Williams has joined her sister Serena in an early exit at the French tennis Open in Paris, losing to the third seed Agnieszka Radwanska 6-2 6-3 in their second round match.
Roger Federer and Novak Djokovic had to work surprisingly hard in their second round matches in Paris.
Federer was taken to four sets by the Romanian outsider Adrian Ungur in achieving a record 234th grand slam match win, while the world number one Djokovic was forced to battle in the second and third sets of his match against Slovenia's Blaz Kavcic, after winning the opening seven games.
The women's world number one Victoria Azarenka redeemed herself after narrowly avoiding a first-round defeat when she easily beat German qualifier Dinah Pfizenmaier 6-1 6-1 in round two.
In the biggest upset of day four, the local favourite and eighth seed Marion Bartoli lost in three sets to Croatia's Petra Martic, the world number 50.
