Highlights of the sixth day of the Australian Open on Friday (all times GMT): 1229 DANILOVIC STUNS PEGULA Serbia's Olga Danilovic, ranked 55th in the world, stunned American seventh seed Jessica Pegula,

Iga Swiatek, of Poland, plays a backhand return to Rebecca Sramkova, of Slovakia, during their second round match at the Australian Open on Thursday in Melbourne.

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,

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.