'Extremely lucky' Djokovic into Melbourne semi-finals as Musetti retires

The fifth-seeded Italian was well on top and leading 6-4, 6-3, 1-3 when he withdrew after treatment on his upper right leg, with his movement badly impeded. It was a huge stroke of luck for the error-riddled 10-time Melbourne winner Djokovic, who will now play either defending champion Jannik Sinner or American eighth seed Ben Shelton for a place in the final. The let-off kept alive his bid to secure a record 25th major title. Djokovic has been trying to move past Margaret Court and clinch the...