Federer made a show of himself last night swearing at the umpire and hounding his opponent. He was obliterated in the end by Del Potro's groundstrokes and totally intimidated. I cant see federer winning another GS now. He's shot his bolt. That was a big psychological moment. An injury-free Nadal, Del Potro, Djokovic, Murray, Soderling and Cilic. That's the future right there.