What is it, your period Nadal *****?
Sheesh. Rafa should be considered the favorite on clay even if Novak was still playing at his peak level by virtue of the fact that Rafa has dominated that surface as no surface has ever been dominated before. Having said that, I still think Djesus can beat Rafa if he plays well, and that goes for Roger as well. This does not mean I expect either Roger or Djesus to be favorites against him. Them beating him would be the upset, not the expectation.
On other surfaces, I give the edge to Djesus, just because IMO it seems as if his game is far better suited to grass and HC than Rafa's.