Nadal was in the AO final (could have easily won it) and won RG last year though.Wimbledon 2014: Djokovic def. Federer 6-7(7) 6-4 7-6(4) 5-7 6-4
Roland Garros 2015: Djokovic def. Nadal 7-5 6-3 6-1
The answer is quite obviously Federer, who will always be an outsider with his serve. This isn't WTA where a sick 33 year old with bad movement can snatch up a slam at Roland Garros, where movement should be the most important, on her worst surface while playing the worst tennis of her career.
Yeah, but Nadal's level has spectacularly dropped since then, while Federer's has stayed more or less the same. To be clear, I don't think that Nadal will return to his old level, like Murray did.Nadal was in the AO final (could have easily won it) and won RG last year though.