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SINGAPORE - NOVEMBER 01: Sania Mirza of India and Martina Hingis of Switzerland celebrate match point during their doubles final match against Carla Suarez Navarro and Garbine Muguruza of Spain during the BNP Paribas WTA Finals at Singapore Sports Hub on November 1, 2015 in Singapore. (Photo by Julian Finney/Getty Images)

SINGAPORE - NOVEMBER 01:  Sania Mirza of India and Martina Hingis of Switzerland  celebrate match point during their doubles final match against Carla Suarez Navarro and Garbine Muguruza of Spain during the BNP Paribas WTA Finals at Singapore Sports Hub on November 1, 2015 in Singapore.  (Photo by Julian Finney/Getty Images)