Tropical Storm Irene champion Petra Kvitova goes out in third round of U.S. Open . Czech is beaten in straight sets by Britain 's Maria Sharapova . ( CNN ) -- Maria Sharapova taken to three sets by U.S. 's Heather Watson .
Tropical Storm Irene champion Petra Kvitova goes out in third round of U.S. Open . Czech is beaten in straight sets by Britain 's Maria Sharapova . Maria Sharapova taken to three sets by U.S. 's Heather Watson .