Who won the 2015 BNP Paribas WTA Finals in the Women’s Category?

The Achievement: Sania Mirza and Martina Hingis (often nicknamed "Santina" by fans) won the 2015 BNP Paribas WTA Finals women's doubles title in Singapore. They defeated the Spanish duo of Garbiñe Muguruza and Carla Suárez Navarro in straight sets ($6\text{–}0$, $6\text{–}3$) to cap off an incredibly dominant year together.