Serena hits the ball harder than AO men finalists...
Djoko and Andy playing safe tennis. Serena striking the balls harder than those two.
Martina Hingis & Sania Mirza
2015 Doubles titles: 10 -
Brisbane, Indian Wells, Miami, Charleston, Wimbledon, US Open, Guangzhou, Wuhan, Beijing, Singapore
2016 Doubles titles:
Brisbane, Sydney, AO, St. Petersburg, Rome