The sassy Collins, who calls herself The Danimal, told fans to “shut up” and then cupped her hands to her ears, blew kisses and slapped her backside after beating qualifier Destanee Aiava.

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.

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,