Jannik Sinner has cast doubt on his French Open participation, with the world number two saying he will only compete at Roland Garros later this month if he fully recovers from a hip issue that forced him out of Madrid and Rome. Sinner sustained the injury at Madrid and pulled out of his quarter-final against Canada’s Felix Auger-Aliassime last week, before the Italian decided to skip the Rome tournament which runs from May 8-19. The 22-year-old, who claimed his maiden Grand Slam title at the Australian Open in January, said the injury was more serious than initially suspected. “At Roland Garros, I’ll only play if I’m 100%, if there’s any doubt we have to see,” Sinner told reporters. “Some injuries can be prevented, some can’t. So far we’ve done a great job, last year I played a whole season without injuries and also in this season so far.”