Nadal matches up fairly well with every contender on grass. Djoker, Murray, Roddick, Federer......He has a win over all those guys on grass. It's also worth mentioning that some guys that have given Nadal trouble on hard courts(Davy and Del Po) suck on grass. Remains to be seen if they ever become grass forces. If they don't, that's one less problem to worry about in the late rounds.
3-4 more deep runs for Rafa in his Wimbledon future.