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 presenter at the center of Novak Djokovic’s decision to boycott on-court interviews at the Australian Open has apologized to the 24-time Grand Slam champion, saying that he “overstepped the mark.” Channel 9 presenter Tony Jones was overlooking a group of Serbian fans while recording a dispatch from Melbourne Park Friday night.

The Channel 9 broadcaster who angered Novak Djokovic has since apologised if he offended the Serbian, who had refused to conduct interviews with them at the Australian Open