The 22-year-old from Italy posted on social media that he was advised by a doctor that he should sit out the Summer Games. Sinner won the Australian Open in January for his first Grand Slam title and moved up to No. 1 in the ATP rankings last month after reaching the French Open semifinals.

The draw for Olympic tennis is Thursday. Matches begin Saturday.

"Missing the Olympics is a big disappointment given that it was one of my main goals this season,” Sinner wrote in Italian. “I couldn’t wait to have the honor of representing my country in this extremely important event.”

(For more sports news and updates, follow Ahram Online Sports on Twitter at @AO_Sports and on Facebook at AhramOnlineSports.)