MELBOURNE: Novak Djokovic knows all too well the mountain he must scale to capture an elusive record 25th Grand Slam crown, but the Serbian great is not ready to “walk out with a white flag” just yet. The 38-year-old was gifted passage into an Australian Open semifinal showdown with Jannik Sinner after Lorenzo Musetti retired hurt when in complete control of their last-eight clash, 6-4, 6-3, 1-3. It followed a free ride through the fourth round when Jakub Mensik withdrew without a ball being hit.

Novak Djokovic's chances of winning a record 25th Grand Slam title are increasingly becoming now or never. Are the stars aligning in Melbourne?

Novak Djokovic's bid for more tennis history is still alive as he scrapes into the Australian Open semi-finals as Lorenzo Musetti retires injured at two sets up.