Novak Djokovic wins Australian Open

Novak Djokovic has clinched a record-extending eighth Australian Open title.

The world no. 2 beat fifth seed Dominic Thiem 6-4, 4-6, 2-6, 6-3, 6-4 in the final, which stretched for more than four hours.

Djokovic looked to be in trouble when he lost the second set and exchanged angry words with the umpire.

He also called the doctor twice while trailing before fighting back.

It's the Serb's 17th Grand Slam title, which also sees him reclaim the No. 1 ranking from Rafael Nadal.

Meanwhile, Thiem has now lost all three of his grand slam finals.