Zheng Saisai (R) and Xu Yifan of China compete during their women's doubles second round match against Martina Hingis of Switzerland and Sania Mirza of India at the WTA Qatar Open 2016 in Doha, Qatar, Feb. 23, 2016. Martina Hingis and Sania Mirza won 2-1. (Xinhua/Nikku)
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