Novak Djokovic declined a post-match TV interview after winning in the fourth round of the Australian Open after an on-air personality from the local Australian broadcaster of the tournament made negative comments about him in front of Serbian fans.

The host broadcaster has apologized after Novak Djokovic declined to do a customary post-match on court interview at the Australian Open Sunday to protest comments made on air by someone who works for the TV network.

Tennis star Novak Djokovic refused to participate in a customary post-match interview after advancing to the quarterfinals in the Australian Open on Sunday, blaming the tournament’s official broadcaster after a presenter “decided to mock” Serbian fans.