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MELBOURNE, Australia — Lorenzo Musetti retired injured with a two-set lead over Novak Djokovic during the Australian Open quarterfinals.
The Italian No. 5 seed led 6-4, 6-3 in a dominant display before pulling up with an injury to his upper right leg early in the third set.
Djokovic, who had put in a listless performance hampered by blisters, stretched out on the side as Musetti received a medical timeout.
He tried to play on, but after two games in which he could barely move, he was forced to shake hands with the 10-time champion.
Djokovic moves into the semifinals, to face Lorenzo Musetti or Ben Shelton.
This is a developing story and will be updated.