Former World No.1 Maria Sharapova bows out of the U.S. Open tennis championship by Flavia Pennetta. The third seed Russian girl made lots of unforced errors and especially two double faults in the final game of her serve made her trouble. Pennetta won the first set with ease 6-3 and then Maria Sharapova came back strongly in the second set. But Maria lost her momentum in the final set of the third round match. The final score is Flavia Penneta defeated Maria Sharapova 6-3, 3-6, 6-4.