Former world number two Maria Sharapova into quarterfinals of Uzbek event in Cincinnati . Italy 's Flavia Pennetta beat sixth seed Vera Zvonareva of Russia 6-4 6-3 . Sharapova beats Akgul Amanmuradova in straight sets 6-2 6-3 in seventh round . Top seed Jelena Jankovic crashes out to WTA qualifier Akgul Amanmuradova .
Former world number two Maria Sharapova into quarterfinals of Uzbek event in Cincinnati . Sharapova beats Akgul Amanmuradova in straight sets 6-2 6-3 in seventh round . Top seed Jelena Jankovic crashes out to WTA qualifier Akgul Amanmuradova .