Zverev has apologised. He got disqualified from the singles draw for his behaviour.
Bear in mind, the lad stands accused of domestic abuse by his ex-girlfriend, a female tennis player. That investigation is ongoing and there are questions over how that is being handled by the ATP, who haven't actually commented upon it.
This behaviour isn't evidence in any way regarding that investigation but people are now asking, if he can behave like that when he loses his temper, then what else might he be capable of? And he can only blame himself.
If it's discovered that he is guilty of crossing the line with his ex-girlfriend and abusing her, then it's going to look pretty bad on the ATP, who have placed no restrictions on him competing on the tour while the investigation goes on. Innocent until proven guilty, yes, but the men's and women's tours overlap an awful lot of the time. I don't actually know if his accuser is still on tour herself but if she is, they're very much at risk of crossing paths with each other on a regular basis. Just have to hope there is nothing in those reports as it isn't a good luck for ATP to have done nothing about it.