Fiery Novak Djokovic powers through Ernests Gulbis test

Novak Djokovic argued with the umpire and roared with delight as the Serbian brushed aside Ernests Gulbis to reach the last 16 at Wimbledon.

Djokovic came back from a break down to win the opening set and from there his victory was never in doubt as the 12-time major champion won 6-4 6-1 7-6 (7/2).