Don't get the point of this thread. Fed fans don't have much to fear - Nadal's knees have basically killed any chance of passing Federer - needed to win at least 2 slams this year. Trying for 14 is definitely more realistic - couple more RG and maybe a Wimbledon seem do-able if he's playing 2+ more years. All that said Nadal also isn't playing in an era where he has no great rivals - he has only won 1 slam without beating at least 1 of Federer/Murray/Djokovic (French Open 2010 - would have won if he'd faced those guys anyway) - Fed on the other hand had many times where the final itself really wasn't a mental battle - imagine facing Baghdatis or Philppousis in a best of 5 match. Novak, Rafa and even Andy would cruise too.
LOL at you putting Murray at the same level of battling Federer and Djokovic. And that's because Nadal has only 4 slams outside of clay anyway. As if Nadal has any great rivals on clay? The second best claycourter of this era is Federer and clay is Federer's worst surface. Wimbledon 2010, he only had Murray to deal with. And let's not act as if beating pre-2011 Djokovic is the same as beating Djokovic today.