Novak Djokovic and Carlos Alcaraz will square off again in a Grand Slam after both stars won their fourth-round matches Sunday at the Australian Open.

Novak Djokovic has overcome some trouble breathing and played quite well for a straight-set victory over 26th-seeded Tomas Machac to reach the fourth round at the Australian Open.

The 24-time Grand Slam champion is a master of easing into majors. At every one, he has a match that lifts him up. Will this one be it?

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 called Danielle Collins' feisty reaction to Australian Open hecklers "funny" and "smart" after himself getting riled up during his third-round win on Friday.

Novak Djokovic declared himself a big fan of Danielle Collins’ approach to rowdy Australian Open fans after confronting his own heckler at Melbourne Park. Collins made a big show of taunting the crowd after her late-night victory over home hope Destanee Aiava on Thursday,

Read what Novak Djokovic had to say about Danielle Collins' controversial action and remarks after her Australian Open victory.

Tennis great Novak Djokovic applauded Danielle Collins for her witty response to the Australian crowd's heckling during her second-round match. Collins humorously stated that the hecklers' ticket money would fund her next five-star vacation.