Novak Djokovic 

BBC

Novak Djokovic 

Novak Djokovic survived an early scare to beat Stanislas Wawrinka 1-6 7-5 6-4 6-7 (5-7) 12-10 in a five-hour epic encounter and set up an Australian Open quarter-final with Tomas Berdych

The world number one came back from 6-1 4-1 down to win 1-6 7-5 6-4 6-7 (5-7) 12-10 in an electrifying night session on Rod Laver Arena.

It was the Serbian's 18th straight win at Melbourne Park, and sets him up for a quarter-final against Tomas Berdych, reports the BBC.

Djokovic, 25, is trying to become the first man since the Open era began in 1968 to win three Australian titles in succession.