Indo-Swish pair of Sania Mirza and Martina Hingis entered the semi-finals of the WTA Finals after beating Taiwanese combination of Hao-Ching Chan and Yung Jan Chan 7-6, 7-5 in Singapore today.The duo will be pitted against the winner of the match between top seeds Caroline Garcia-Kristina Mladenovic and Bethanie Mattek-Sands- Lucie Safarova. This is the pair's first competition since they had split following an early exit at Montreal in July.