Playing in the U.S Open , she defeated Olga Govortsova in the first round but lost 6-0 , 6-0 to 10th seed Flavia Pennetta of Italy . Playing in the U.S Open , she defeated Olga Govortsova in the first round but lost 6 â `` 0 , 6 â `` 0 to 10th seed Flavia Pennetta of Italy .