Grigor Dimitrov was forced to retire from his Wimbledon last-16 loss against Jannik Sinner on Monday night after suffering a muscle tear while two sets up

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.

Tennis pro Grigor Dimitrov suffered a shock pec injury with the world's number 1 tennis player on the ropes. Dimitrov was defeating Jannik Sinner in what was shaping up to be a surprise upset and maybe the highlight of his career when he clutched his pec and grimaced in pain after a powerful serve.