I've noticed, everytime Nadal loses early in a slam, Federer struggles in his next match. French Open 2009, he was so close to losing against Haas, Last year at Wimbledon, he almost lost to Benneteau, and now this year, against Stakhovsky he did lose. Its like all the weight of the world goes on Federers shoulders when Nadal loses, because everyone knows that his chances of winning the slam have significantly increased. This year, he couldn't quite escape.