My favorite player for the last few years in the ATP is Berdych. Out of all the big servers(Del Potro/Raonic/Isner), Berdych has the best all around game imo. Those other players have holes in their groundstrokes while Berdych is solid in almost every stroke forehand/backhand/volleys/big serve. Among the big three Djoker, Nadal, Fed ...I think Berdych has the closest chance to upset one of them .He has so many weapons and of course that big serve which has oddly been quite effective on clay this year. I also like how he hits his groundstrokes flat with great pace.
Berdy took Fed and Djoker to the brink of elimination on clay earlier this year. With all the attention on the top four, look for Berdych to be right in the thick of it. Ferrer would be my next choice but I still like Berdy's game better.
My boy Berdych will make it to at least the QF this year ...I'll be tracking his progress here.