Juan Martin Del Potro
I always have a soft spot for players who are coming back from injury, especially one as hard as Delpo's. But it's much more than that with him - he can play some amazing tennis (which has left him for a while in the late month or so, unfortunately), and he seems to have such a quiet and sweet personality. So, I really hope he stays away from my favourites in the US Open, and gets far there.
(Photos: Reuters Pictures, AP Photo)