As Danielle Collins walks out to Rod Laver Arena on Saturday night (local time), you may hear a few boos from the Australian Open crowd.

MELBOURNE, Australia — 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, including Friday night at Rod Laver Arena.

Collins defeated home favorite Destanee Aiava in a controversial second-round clash, to the displeasure of a hostile crowd in Melbourne.