In the Women's Doubles semi-finals of the China Open Tennis tournament in Beijing, India's Sania Mirza and her Spanish partner Nuria Llagostera Vives will take on the Chinese-Slovenian combination of Jie Zheng and Katarina Srebotnik today.Sania and Nuria had waltzed into semi-finals after defeating the German-Czech duo of Julia Goerges and Barbora Zahlavova Strycova, 4-6, 6-4, 16-14, in the quarterfinals yesterday.Meanwhile, in the Men's Doubles quarterfinals today, Denis Istomin of Uzbekistan and his partner from Argentina, Carlos Berlocq defeated the Indian duo of Mahesh Bhupathi and Rohan Bopanna 6-2, 7-6.