Jannik Sinner advanced to the Wimbledon quarterfinals despite hurting his right elbow in a fall in the opening game and dropping the first two sets Monday night, when his opponent, Grigor Dimitrov, wound up quitting in the third because of an injured pectoral muscle.

Jannik Sinner is through to the Wimbledon quarterfinals, though not in the way he wanted. Sinner lost the first two sets of his fourth-round match with Grigor Dimitrov on Monday before Dimitrov was forced to retire from the match after suffering an apparent pectoral injury.

THE ALL ENGLAND CLUB, LONDON — World No. 1 Jannik Sinner was on the precipice of a fourth-round exit from Wimbledon when he ended up on the receiving end of the absolute worst kind of good luck in sports.