Sania Mirza and her Zimbabwean partner Cara Black reached the Semi Final of Women's Doubles of the US open Tennis Tournament. Third seed Indo-Zimbabwean pair had an easy day out as Kazakh- Chinese pair of Zarina Diyas and Yi-Fan Xu retired from the match at score 1-6, 0-1.In the Mixed Doubles semi final event to be played later in the evening, Sania Mirza and her Mixed Double Brazilian partner Bruno Soares will take on Yung-Jan Chan from Chinese Taipei and Brit Ross Hutchins.