Channel 9 host Tony Jones has angered Novak Djokovic’s supporters by going rogue and sledging the Serbian superstar on a live broadcast.

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.

Australian broadcaster Tony Jones has apologized to Novak Djokovic for comments he says were intended to be “banter” and “humor.”