Novak Djokovic has backed Danielle Collins for her cheeky response to hostile fans at the Australian Open and said the sport could afford to take itself a little less seriously.

Read what Novak Djokovic had to say about Danielle Collins' controversial action and remarks after her Australian Open victory.

Novak Djokovic declared himself a big fan of Danielle Collins’ approach to rowdy Australian Open fans after confronting his own heckler at Melbourne Park.

Novak Djokovic has had his say after Danielle Collins caused controversy with her antics at the Australian Open. The American star riled up the fans after beating Destanee Aiava on Thursday, gesturing to kiss her bottom and reminding them that she was taking a “big fat pay cheque”.

Novak Djokovic approved Danielle Collins' response to Australian Open hecklers as the Serb funnily stated that he is now "a big fan" of hers. On Thursday, the American tennis star edged out Australian qualifier Destanee Aiava 7-6 (4) 4-6 6-2.

Novak Djokovic has thrown his support behind Danielle Collins and her reaction to the hostile Australian Open crowd after having his own running battle with fans on Friday night. The 24-time major winner booked his spot in the fourth round at Melbourne Park after a comfortable 6-1 6-4 6-4 win over Tomas Machac on Rod Laver Arena that he described as his best display of the tournament so far.

Novak Djokovic and Danielle Collins have both been involved in some controversial moments during the Australian Open.

Novak Djokovic called Danielle Collins' feisty reaction to Australian Open hecklers "funny" and "smart" after himself getting riled up during his third-round win on Friday.

Count Novak Djokovic as being in Danielle Collins’ corner. He thinks her response to booing fans at the Australian Open was absolutely fine.

Ten-time Australian Open champion Novak Djokovic has thrown his support behind Danielle Collins in her battle with Aussie crowds. Collins had several controversial interactions with the fans during her second-round win over Destanee Aiava,

If you have been following this year's Australian Open, you probably saw what happened in some of Novak Djokovic and Danielle Collins' matches. When complaining about the rowdy crowd, both stars suggested that the alcohol consumption may have played a role in some of the spectators crossing the line.