Began playing at age eight...Surname Wawrinka is of Polish decent but Wawrinka is only Polish by ancestry... Nicknamed Stan...Father, Wolfram is German, and mother, Isabelle is Swiss, both work in a biological farm, helping handicapped people...Grandparents are Czech...Has one older brother Jonathan, who teaches tennis, and two younger sisters Djanaee and Naella, are students and they play tennis...Stopped attending school at age 15 in order to focus on tennis full-time...“It was the natural line for me, the right path, to follow with my tennis,” he says about it...Started playing international junior events at age 14 and then began satellite circuit following year...Town of St. Barthelemy is 10 minutes outside of Lausanne...Hobbies include movies and music...Captured 2003 Roland Garros junior title (d. Baker)...Considers clay best surface and his best shot backhand...Has a 4-7 career Davis Cup record (4-6 in singles) in six ties...Coached by Dimitri Zavialoff (since age eight).