It doesn't look good at all. And it won't bring him into top rankings. If he wants to become a real champion, he has to control his emotions more. It is just silly for a 22 year old man to act like a child. That doesn't mean, that he has to become a cold tennis roboter. Just a more grown attitude twowards everyone. Normally he behaves well, but when things don't go like he wants he shows an attitude, nobody likes to see. To smash a racket sometimes is not a big deal, but to be rude against other people (journalists included) is not a good thing.
Jeez he is 22, give him a break. Some people just act more mature than the other at a certain age. Just let him be who he is
The interviews issue is just one aspect he doesn't deal pretty well with yet, but that doesn't mean he is child. I am 22 aswell and I'm still trying to find my way in certain situations, why is that such a bad thing?
Anyway, pointless discussion in the wrong thread so I'll leave it at that.