Fair comment.

Emotions and passions can be high. Anyone who has played can verify that some players play very much with heart on the sleeve and can make comment during matches. They are often the type of people that either apologize afterwards or revert back to behaving like nothing happened. It's just a foible of certain people. There team mates understand it, the coaches understand it. Only when it becomes a regular and disruptive occurrence should it be worried about.

When a player is emotional during a game, it generally shows commitment to the cause. I wouldn't worry too much about it.