Novak Djokovic has declined to do a customary post-match TV interview at the Australian Open to protest comments made on air by someone who works for the official broadcaster of the tournament in the host country,

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.

MELBOURNE, Australia -- It's time for the eighth installment of the riveting, intergenerational rivalry between Novak Djokovic and Carlos Alcaraz. This one, though, will be the first at the Australian Open — and the first in the quarterfinals of a tournament; each of the others came in either a semifinal or final.