That's not entirely true CD, again.
He did a big c'mon against Bennetau in Cincinnati when Benny DFd. He got criticised for it for pages and pages on GM.
i missed that one obviously. i thought he was doing all he can to clean up his image and all. he is quite respectful when he plays guys like the clay monster and fed.
the big screaming c'mons are probably just a habit that may take a little longer to break. rusty(hewitt) used to do that a lot and then he grew out of it.
we have to understand that 99% of the time, guys like djokovic, murray, and some of the others that might pound their chests or scream c'mons are just trying to pump themselves up.
it is not intended as a cheap shot at the guy across the net.