Paris - Canada's Milos Raonic, who has been battling a knee injury, pulled out of the French Open on Sunday.
"It is with a heavy heart that I am withdrawing from @rolandgarros," wrote the 27-year-old on Twitter.
"I have many great memories there, but I know I need to continue working hard to put myself in the best position when I step out on the court.
"Thank you all for your support and see you soon on the grass."
The world number 22, a Wimbledon runner-up in 2016 and who reached the French Open quarter-finals in 2014, had withdrawn from the Monte Carlo Masters in April with a knee injury before his third round match.
He returned for the Madrid Masters where he lost in the third round to compatriot Denis Shapovalov.
The French Open starts in Paris next Sunday.