Unless he starts working on the fitness I'm afraid he'll continue to get what he's gotten lately.
I just hope that he doesn't think his forehand will be enough, he'd be dead wrong.
There's no shortcuts, the hard yards have to be done.
I am afraid to say he can have some serious problems to stay injury free and that really affects what he needs to improve more, his confidence and mental strenght, for example he withdrew from Queen's, then with what kind of confidence is he going to compete at Wimby. at least his serve has improved so much, when he came to the scene, all the comments where about he is so tall but has no serve. he really needs to think he can beat the top 3, like at the uso 09, but he needs to stay healthy to have confidence in himself. if he stays injury free and cam improve fitness he'll be back trying to challenge the big 3, never thought he is the in the same category as Berdych who has the game but will never have the selfbelieve that is needed.