The Serb keeps his dream of a record 25th grand slam title alive by battling past the world No 2 in five sets.

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.

Ten-time champion Novak Djokovic survived a massive scare to reach the semi-finals when Lorenzo Musetti was forced to retire hurt while two sets up