Top seeded Sania Mirza of India and Martina Hingis (Switzerland) were shocked by Taipei pair of Hao-Ching Chan and Yung-Jan Chan who registered 6-0, 0-6, 10-6 verdict in the 73 minutes in the women's doubles semi-final in the $ 3,826,655 Western and Southern Open Challenger, US Open Series, here on Saturday.Martina and Sania saved four of eight break points and won six of 11 break points while the Taipei duo saved six of 17 break points and won four of eight break points.