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.

American fifth seed Taylor Fritz had little trouble in reaching his third Wimbledon quarterfinal after Jordan Thompson retired with a thigh injury.

Wimbledon organisers apologise after the electronic line-calling system on Centre Court is turned off in error and misses three calls in one game.