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.

Aussie broadcaster Tony Jones apologized to Novak Djokovic and Serbian tennis fans after he admittedly crossed the line in heckling fans at the Australian Open.

Nine’s veteran sport host has apologised on air “for any disrespect” felt by the 10-time Australian Open champion, as the Serbian Council of Australia call for him to be fired.