Novak Djokovic advances to the Australian Open semifinals after Musetti retires with injury

Top-seeded Novak Djokovic secured his place in the Australian Open semifinals on Wednesday when Italian opponent Lorenzo Musetti retired with an injury during their quarterfinal match at Melbourne Park, with the Serb leading two sets to love when the match was halted. The 24-time Grand Slam champion was in complete control throughout the contest, breaking Musetti's serve multiple times and demonstrating the form that has made him a dominant force at Melbourne Park over the years. The unexpected retirement came as Djokovic was serving at 4-1 in the third set, ending what had been an increasingly one-sided contest as Musetti appeared to struggle with a physical issue that had been bothering him throughout the match. Djokovic, who has won a record 10 Australian Open titles, will now face either Jannik Sinner or Andrey Rublev in the semifinals as he continues his quest for another championship at the year's first major tournament.