Im going with kohli in 5 again. Even in the short time i've been watching him i've learned that you dont ever know what to expect he can lose to someone he should have no problem with or win against someone you never think he would. He hasnt had one of those kind of wins in a while so i'd say he's due one now
I wish he was more consistent, but it's kind of funny to think that he has a great shot of upsetting Roddick again, but then he'd probably lose to Mayer/Lu
Always puts up a fight/beats top players (see Nadal at the AO, Fed at Wimbledon last year in a sense, of course Roddick)...I'm going Roddick in 5 though.