Jiri Lehecka (No. 29 in the world) takes on Novak Djokovic (No. 7) in the Round of 16 at the Australian Open.Djokovic secured a three-set win over Tomas Machac (6-1, 6-4, 6-4) in the

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, Coco Gauff roll to Australian Open's 4th round. Naomi Osaka retires due to injury and Jessica Pegula was upset in the third round.