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.

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.

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.