Novak Djokovic has overcome some trouble breathing and played quite well for a straight-set victory over 26th-seeded Tomas Machac to reach the fourth round at the Australian Open.

Novak Djokovic stepped up a level in his Australian Open third round match against Tomas Machac, brushing the Czech aside 6-1, 6-4, 6-4 with a vintage performance to reach the second week at Melbourne Park for the 17th time.

Tomas Machac (No. 25 in the world) takes on Novak Djokovic (No. 7) in the Round of 32 at the Australian Open.Djokovic defeated Jaime Faria 6-1, 6-7, 6-3, 6-2 on Tuesday in the Round