Serena Williams battles past Marion Bartoli in New York Open quarterfinals . Australian third seed into semis for the first time since her 2006 title in New York . She will face world No . 1 Maria Sharapova , who beat her in Russian Open final . Olympic champion Serena Williams will play Sara Errani in the other semifinal .
Maria Sharapova battles past Marion Bartoli in U.S. Open quarterfinals . Russian third seed into semis for the first time since her 2006 title in New York . She will face world No . 1 Victoria Azarenka , who beat her in Australian Open final . Olympic champion Serena Williams will play Sara Errani in the other semifinal .