yeah, but you don't have to run when you're playing doubles. i bet the number of players who smoke at least doubles (if not triples) if you compare singles players and pure doubles players.
and mentioning rafa and federer in a sentence with petzschner? i don't know, pretty insulting to the two. petzschner is what, the 500, 600 in the world?
He plays tennis for a living, just like Federer does. So he's a pro. You know exactly that his bad ranking is caused by long injury breaks again and again, currently a torn ligament. I have newspaper articles reporting that Petzschner defeated Al Ghareeb last year in 3 sets because of his superior fitness.
I think players would be more likely to drink after a bad loss than smoke, Andy has at least jested about doing that. How stupid would it be to smoke though during your career? It's like not even caring about your health and health is an athlete's primary concern.
Some people just don't care though, even if they're athletes. I mean, some singers smoke up a storm and you could argue that they have as much of a vested interest in keeping that crap away from their lungs.