Novak Djokovic reaches Australian Open semi-finals after Lorenzo Musetti retires

Novak Djokovic was given an Australian Open reprieve when quarter-final opponent Lorenzo Musetti retired injured leading by two sets to love.

An out-of-sorts Djokovic looked to be heading for the exit door, but Musetti sought treatment for a thigh injury after three games of the third set and played just one more game before shaking hands.

The Italian was leading 6-4 6-3 1-3, but it quickly became clear he was in major trouble as he barely moved to shots, and he pulled off his bandana before heading to the net.

Heartbreaking