Federer showed up to play against Nadal so many times on clay even after repeat losses. He maintained a consistent level of play and persevered even though he didn't win a single slam for for 2.5 years. Nadal sulks and hides like a bitch after one tough loss.
The level of stupidity and hate in the thread is literally off the charts.
Nadal has a history of knee problems deriving in large part not simply from his style of play but rather an even more serious foot problem which led to him compensating in a way which is bad for his knees.
This condition is always in the background. All kinds of people have handicaps of one sort or another and instead of laughing at a guy for missing parts of his career or claiming he is "sulking" it would be nice to appreciate what he has done in spite of that.
But on this board, full of sad little haters who feel so tough and smart from their keyboards and who have accomplished usually little or nothing in the sport they claim to know so much about, nothing other than the wet-dream of their favorite's glory (usually Federer here) matters and all reality is contorted in the support of this children's tale.