Originally Posted by Flash O'Groove
Nole is a heavy favorite for AO. I don't really see Fed beat him there. Murray could, but it will be though.
If Nadal is not in good form for Roland-Garros, then Fed will give it a real shot, which I don't think he did in 2012. They are 3-3 on clay, 1-1 at RG. Nole would be a favorite, but it wouldn't be a given for him to beat Fed. Del Potro could also be a threat in Paris.
Nole won't be favorite at Wimby if Fed and Murray are in good form. Other player could beat him in a good day (Tsonga and Berdych).
The US Open is...open. It Murray, Federer, maybe Del Potro can beat him here.
Without Nadal, Djoko would be the overwhelming favorite at RG. Fed is too old for red clay (in 2012, he lost to Djoko both in Rome and RG and was close to losing to Delpo at RG, it will be worse this year). The one slam I don't see Djoko winning is Wimbledon. Not that it is impossible but I would still put Fed and Murray as favorites over Djoko there.
ETA: Djoko is a terrible matchup for Delpo, I don't know how on earth you imagine Delpo could beat him at USO. I disagree with that too.