Kei Nishikori at full stretch on his way to victory over Teymuraz Gabashvili of Russia in the fourth round of the French Open. Clive Mason/Getty Images
Roger Federer is a picture of concentration during his fourth round clash against Gael Monfils at the French Open which was called off due to bad light with the score one set all.Dominique Faget/AFP/Getty
Stanislas Wawrinka wasted little time in ending the hopes of French ace Gilles Simon in the last 16 and could meet Federer in the quarters.Patrick Kovarik.AFP/Getty
Jo-Wilfried Tsonga became the first Frenchman to reach the quarterfinals of this year's grand slam at Roland Garros as he beat Tomas Berdych.Aurelien Meunier/Getty Images
Former champion Ana Ivanovic was delighted to reach the quarterfinals of this year's French Open.Patrick Kovarik/Getty Images