Not at the rate he's playing now
But he has the game to win Any of them. He has had difficulty at Wimbledon, but he certainly has the game to win there. I mean Federer fell in the 1st rd. 3 times before he won it last year!!!
Safin's serve should be very hard to return on the grass, plus he has an all court game, can Serve & Volley on grass. Same at the Open. I think Federer would of still won Wimbly even if he played David, because he loves the surface, and is a very fine grass court player. I can only really see Grass court specialists giving him trouble on this surface, and David as well, but they've never played on grass so.... who knows