Sloane Stephens challenges John Isner to a serving duel via Twitter

Stephens will return to competition next week at the Citi Open in Washington D.C. (Julian Finney/Getty Images) Sloane Stephens took to Twitter on Thursday for

Courtney Nguyen | Jul 26, 2013

Sloane Stephens challenges John Isner to a serving duel via Twitter /

Stephens will return to competition next week at the Citi Open in Washington D.C. (Julian Finney/Getty Images)

Sloane Stephens took to Twitter on Thursday for a Q&A session with fans on behalf of her kit sponsor, Under Armour.

The No. 2 American behind Serena Williams, Stephens made her top 15 debut this week and is set to return to competition next week at the Citi Open in Washington, D.C., where she'll begin her three-tournament preparation for the U.S. Open. She's also scheduled to play the Rogers Cup in Toronto and the Western & Southern Open in Cincinnati.

Stephens is looking to keep her exemplary 2013 Grand Slam results going in New York. She's made the fourth round or better at the first three majors, including the semifinals of the Australian Open and the quarterfinals of Wimbledon, where she lost to the eventual champions in both instances.

Here are some of the highlights from Stephens' tweet-fest. She talks about shopping and haters and challenges John Isner to a serve-off:

https://twitter.com/sloanetweets/status/360568317439770624

https://twitter.com/sloanetweets/status/360570559379148800

https://twitter.com/sloanetweets/status/360573387883560962

https://twitter.com/sloanetweets/status/360574724448862208

https://twitter.com/sloanetweets/status/360577089126154242

https://twitter.com/sloanetweets/status/360579132079357953

https://twitter.com/sloanetweets/status/360580296615280641

https://twitter.com/sloanetweets/status/360585314831577088

"Bring it Sloaney!"

Published Jul 26, 2013

COURTNEY NGUYEN

Contributor, SI.com Nguyen is a freelance writer for SI.com, providing full coverage of professional tennis both on and off the court. Her content has become a must-read for fans and insiders to stay up-to-date with a sport that rarely rests. She has appeared on radio and TV talk shows all over the world and is one of the co-hosts of No Challenges Remaining, a weekly podcast available on iTunes. Nguyen graduated from the University of California, Irvine in 1999 and received a law degree from the University of California, Davis in 2002. She lives in the Bay Area.