
Del Potro: Playing better now than when I won U.S. Open
After losing in a third set tiebreaker to Novak Djokovic in the Shanghai final, Juan Martin del Potro says his form is even better than when he won the 2009 U.S. Open, beating Rafael Nadal and Roger Federer in succession. In the past two weeks, del Potro beat Milos Raonic