Novak Djokovic declined to do a customary postmatch TV interview at the Australian Open after his win Sunday night to protest comments made on air by someone who works for the official broadcaster of the tournament in the host country.

Carlos Alcaraz and Novak Djokovic have set up a quarterfinal showdown at the Australian Open. Tuesday's contest will be their eighth head-to-head matchup, but their first at Melbourne Park and their first that is neither a semifinal nor a final.

Djokovic eased into the quarter-finals after a straight-sets win over Jiri Lehecka but the Serbian then refused to take part in the traditional on-court interview