Count Novak Djokovic as being in Danielle Collins’ corner. He thinks her response to booing fans at the Australian Open was absolutely fine — which should come as no surprise, given the way Djokovic gets into back-and-forths with hecklers at his matches,

American tennis player Danielle Collins embraced the Australian Open boos after her latest win. But there's more to her heel turn than meets the eye.

Danielle Collins appeared to revel in playing the part of pantomime villain at the Australian Open on Thursday as she took down home favorite Destanee Aiava 7-6, 4-6, 6-2 in front of a raucous crowd.