Roger Federer made another incredible, between-the-legs shot in Wednesday's round two match in Shanghai against John Isner. Federer has done this before. He stunned the crowd at the 2010 U.S. Open when he blew one by Brian Dabul of Argentina with the same shot. He also did it in the 2009 U.S. Open against Novak Djokovic. This time, Isner got his racquet on it, but hit the ball into the net. Scroll down to watch the amazing shot.