The ATP, the governing body of the men’s tennis Tour, announced Tuesday that it had barred John Tomic, the coach and father of the rising Australian player Bernard Tomic, from receiving credentials at all of its events until further notice.

John Tomic has been charged with assaulting his son’s hitting partner, Thomas Drouet, in Madrid last week. Drouet has said that John Tomic broke his nose and knocked him unconscious with a head butt outside their Madrid hotel Saturday after a series of disagreements over the terms of his employment.

Tomic disputed the charge at a hearing Monday in Madrid, claiming that he was acting in self-defense and that he delivered the head butt only because Drouet was holding his arms. Another hearing was set for May 14.

But the ATP, which had revoked John Tomic’s credentials for the tournament in Madrid taking place this week, decided to extend the ban.