In a video of the moment, it looked as though the 34-year-old Dimitrov injured a pectoral muscle on a volley. Almost immediately after the hit, he fell to the ground, clutching the right side of his chest in pain.

Dimitrov & Jannik Sinner share an embrace as Grigor retires from their match at Wimbledon due to injury Grigor has had to deal with so much over the last few years Hard to watch this happen to anyone, especially someone as kind & hardworking as him 💔 pic.twitter.com/2k7gXAxgDq

Jannik Sinner has advanced to the Wimbledon quarterfinals despite hurting his right elbow on a fall and dropping the first two sets.