NOVAK DJOKOVIC fought off a strong challenge from Taylor Fritz today to reach the Australian Open semi-finals for the 11th time.

The world number one has never lost in Melbourne once he has made it beyond the last eight, and there is no doubt how much he wants a 25th grand-slam title.

Djokovic had beaten American Fritz in all eight of their previous meetings but this was certainly not straightforward, with the top seed finally securing a 7-6 (3) 4-6 6-2 6-3 victory after three hours and 45 minutes.