He has to stand so far to his left to cover his backhand it's ridiculous. It makes every forehand a defensive shot and he still can't consistently hit a hard topspin BH anyway. He can do anything with his backhand apart from hit it as hard as he can and keep it in, which is the most important thing these days. How can he dominate fast hardcourts but look powerless on grass? Is it because it's harder to slip on hard courts or something? Federer has no weapons on grass against a good player except his serve and the belief that he'll never lose against anyone outside the top 3.