Novak Djokovic was not sure whether he would be able to play in the French Open quarterfinals after injuring his right knee and needing anti-inflammatory pills Monday to be able to finish beating No. 23 Francisco Cerundolo 6-1, 5-7, 3-6, 7-5, 6-3 in the fourth round at Roland Garros for his record 370th win in a Grand Slam match.
