Novak Djokovic said he doesn't know if he will be fit for his French Open quarterfinal after injuring his knee in a five-set win over Francisco Cerundolo on Monday.
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"I don't know what will happen tomorrow or after tomorrow if I'll be able to step out on the court and play. You know, I hope so. Let's see what happens," said Djokovic.
The world No 1 is due to play Casper Ruud on Wednesday for a place in the semifinals. Djokovic beat Ruud in last year's Roland Garros final.