In fairness to the guy i think he just saw red and he has apologised :
"I know that I made a mistake, 100 percent, and I apologize. I feel very sorry to the guy. I didn't want to do that.
"But sometimes you get angry and can't control yourself in moments like that. These moments happen many times, well to me anyway.
"Maybe you throw a racquet or maybe you scream or maybe you do something like that.
"When I hit the board, I didn't want to do it that bad. But that's the way it is. Sometime you cannot control that few seconds."
Nalbandian was clearly genuinely upset that he had hurt McDougall, who briefly appeared to remonstrate with the Argentine after the incident, and admitted he could have few complaints about the punishment."
Still he had to go, there's no doubt about that.
Sorry, but as a professional, he should be in control.
Granted that tennis is a game where it's very hard to vent, but it should never happen.
Saying the 'right' thing after it's happend just doesn't cut the mustard.