Serena Williams wins seventh U.S. Open final , beating fifth seed Li Na . American will play world No . 2 Victoria Azarenka in women 's final . Azarenka defeats 83rd - ranked Flavia Pennetta in the semifinal . She lost to Williams in last year 's semifinal match at Flushing Meadows .
Serena Williams reaches seventh U.S. Open final , beating fifth seed Li Na . American will play world No . 2 Victoria Azarenka in Sunday 's final . Azarenka defeats 83rd-ranked Flavia Pennetta in opening semifinal . She lost to Williams in last year 's title match at Flushing Meadows .