Does anyone else feels it seems Del Potro plays completely out of his mind everytime he has played Federer since the French Open. Basically he plays 3 levels higher than he does vs anyone else, other than maybe his matches with Nadal where he also really hits top gear. That is especialy true looking at yesterdays match. I mean look at his performances this fall: loses to someone named Roger-Vasselin loses to fading veteran Jurgen Melzer nearly loses to a completely washed up Safin in his final match has to save 6 or 7 match points vs Gonzalez is being destroyed by Stepanek before retiring with an injury loses to a sluggish Murray in 3 sets barely scrapes past a choking Verdasco Yet he steps on the court with Federer and suddenly he is this insane beast yet again. Hitting the ball literally twice as hard and serving twice as well as he was in any of those other matches, especialy the ones before the TMC. Imagine him playing the same tennis vs Stepanek, Gonzalez, Safin, Roger-Vasselin, or Melzer, he did vs Federer. He was being completely overpowered by the hard hitting Safin and Gonzalez, and won by their errors, however playing like he did vs Federer he would have bullied those guys with his own power. I watched all those matches and difference in how hard he was hitting the ball and how he was serving was night and day. He would have crushed any of those guys playing the way he did vs Federer, other than maybe Murray. Or imagine him playing the same kind of tennis he did vs any of those guys vs Federer, it would be Federer winning in about 50 minutes even if he had an off day. It is just funny to see how much better he seems to play vs Roger than anyone else. I sort of had that sense before, but seeing him sluggish play all fall and then him come out like a beast yesterday I am even more convinced of it.