I just don't think He can win anymore on HC, and on clay we already know, so his chances are only on grass. If He can't win grass where will He win?? Nowhere else, not to mention that He will be so down in confidence that will hard for him to come back again. For me this title is already in the bag, Roger is playing his best tennis ever, just played amazing in RG, could have beaten Nadal there, or let Djoker have done the job, but He failed. Now it is his turn. If He wins on grass He has a 20% chance to win the US Open.