Novak Djokovic reaches Australian Open semi-finals after Lorenzo Musetti retires due to injury, setting new match records. https://english.mathrubhumi.com/sports/tennis/novak-djokovic-australian-open-musetti-injury-p82luzh6?utm_source=dlvr.it&utm_medium=mastodon #NovakDjokovic #LorenzoMusetti #AustralianOpen2026 #semifinals