Roger Federer retired from his Italian Open quarter-final clash against Stefanos Tsitsipas due to an injury to his right leg, organizers said Friday.
The 37-year-old Swiss, who returned to the European clay court season after two years, won consecutive games against Joao Sousa and Borna Coric to reach the quarterfinals on Thursday.
“Unfortunately, King Roger had to withdraw from the tournament due to an injury to his right leg,” the tournament organizers wrote on Twitter.
“We wish you a quick recovery. Thanks for the incredible emotions. ”
The injury casts doubt on his preparations for the French Open this month, with only five clay matches under his belt to the second Grand Slam of the year.
After his quarter-final exit at the Australian Open, the Grand Slam champion 20 times won his 100th singles title in Dubai and added another crown in Miami.
Federer, who is competing for the second title in the French Open of his career, will seek to regain physical fitness before the tournament that will begin in Paris on May 26.