Fed would mop the floor with Nadal at the USO.
People have such short memories
Nadal was playing great tennis at the USO, and would've definitely beaten Roger there, and everyone knew it. Just because you have the WTF in mind, doesn't mean it was the case back then. Rafa was playing some great tennis, and let's take a look at the rock, paper scissors theory again.
Djokovic beats Nadal
Federer beats Djokovic
Nadal beats Federer
And Federer couldn't even beat Novak, Rafa would've ripped him to shreds in straights, maybe in 4. If I remember correctly, weren't some Federer fans relieved Djokovic won, so that Nadal 'wouldn't routine Fed again'?
Nadal is probably the #4 hard court player at the moment (F in Indian Wells, Miami, US Open and Tokyo), these results are only trumped by Djokovic (W Australia, USO, Miami, Indian Wells, Montreal and F Cincinnati), Federer (W Doha, Basel, Paris, YEC and F Dubai) and Murray (W Cincinnati, Bangkok, Tokyo, Shanghai and F Australia). The results pretty much speak for themselves. You've got other players whose games are more suited to hard courts but they still fail to achieve any significant results.
Don't think we should count the indoor results, it plays so different to outdoor hardcourts. Especially since we're talking about slams here, and the fact that Federer owns Nadal indoors, says absolutely zero about what's going to happen when they meet at the AO or USO.
Its all on Novak's racket. Will Novak let Rafael be undefeated @ RG?
Nadal decides what happens at Roland Garros, Novak better hope he can make it to a final there at least once in his career.