Sloane Stephens

Stephens of U.S. serves during her match against Wozniacki of Denmark at China Open tennis tournament in Beijing...Sloane Stephens of the U.S. serves during her match against Caroline Wozniacki of Denmark at the China Open tennis tournament in Beijing October 3, 2013.  REUTERS/Petar Kujundzic

Petar Kujundzic/Reuters

Sloane Stephens of the US serves during her match against Caroline Wozniacki of Denmark at the China Open tennis tournament in Beijing.

Stephens serves to Radwanska at the Rogers Cup tennis tournament in Toronto...Sloane Stephens of the U.S. serves to Agnieszka Radwanska of Poland during their women's tennis match at day four of the Rogers Cup tennis tournament in Toronto, August 8, 2013

Mark Blinch/Reuters

Sloane Stephens, of the US, serves to Agnieszka Radwanska, of Poland, during their women’s tennis match on day four of the Rogers Cup tournament in Toronto