WTT Season: 4th
Right-handed (two-handed backhand)
- Won four Grand Slam doubles titles (2015 Australian Open, 2015 French Open, 2016 US Open, 2017 Australian Open, 2017 French Open; all w/Safarova).
- Won four Grand Slam mixed doubles titles (2012 Australian Open w/Tecau, 2015 French Open w/M.Bryan, 2018 US Open w/J.Murray, 2019 US Open w/J.Murray).
- Currently holds a WTA doubles ranking of No. 20.
- Has achieved a career-high ranking of No. 1 in doubles (Jan. 2017).
- Claimed the 2011 Hopman Cup for the US, partnering with John Isner, to defeat the Belgian team of Justine Henin and Ruben Bemelmans.
- Began playing tennis at age 5, made pro debut at age 14.