Novak Djokovic has been one of many players who have been heckled at the Australian Open - and the 10-time champion praised Danielle Collins' response to the rowdy crowd

Novak Djokovic of Serbia reacts after winning a point against Tomas Machac of the Czech Republic during their third round match at the Australian Open tennis championship in Melbourne, Australia, Friday,

Novak Djokovic said he “loved” Danielle Collins’ reaction to a hostile home crowd at the Australian Open, adding that he was now a “big fan” of the American. After beating home favourite Destanee Aiava on a raucous Kia Arena,

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.

Sue Barker has admitted she worries whether Novak Djokovic is good enough to win the Australian Open this winter at the age of 37. The Serb has battled his way to the third round of the competition with victories over Tomas Machac,