Stanislas "Stan" Wawrinka (born 28 March 1985) is a Swiss professional tennis player. He reached a career-high Association of Tennis Professionals (ATP) singles ranking of world No. 3 for the first time on 27 January 2014. His career highlights include three Grand Slam titles at the 2014 Australian Open, 2015 French Open and 2016 US Open, where he defeated the world No. 1 player in the final on all three occasions. Other achievements include reaching the final of the 2017 French Open, winning an ATP Tour Masters 1000 title at the 2014 Monte-Carlo Masters, and reaching three other Masters finals (at 2008 Rome, 2013 Madrid and 2017 Indian Wells). Representing Switzerland, Wawrinka won gold in doubles at the 2008 Beijing Olympics with teammate Roger Federer, and was also pivotal in the Swiss team's victory at the 2014 Davis Cup.

Wawrinka considers clay his best and favorite surface, and his serve and backhand his best shots. John McEnroe once said that Wawrinka has one of the most powerful backhands ever, and in 2009 said he possessed "the best one-handed backhand in the game." He has been described by The Economist as "Tennis's great latecomer", owing to finding success late in his career. Prior to the 2014 French Open, he requested and was granted a formal change in his name from "Stanislas Wawrinka" to "Stan Wawrinka", stating that he plans to use the abbreviated name in tournament draws and press conferences.

Wawrinka was born in Switzerland to a German father and Swiss mother. He holds dual Swiss–German citizenship. His father Wolfram Wawrinka, a farmer and social worker, is German of Czech ancestry. Wawrinka's paternal great-grandfather originated from Silesia — the border region between Poland and the former Czechoslovakia — and the surname originates with the Polish language. It is related to Wawrzyniec, the Polish version of Laurence, or Laurentius. Wawrinka's mother, Isabelle, an educator, is Swiss. His mother works as a biodynamic farmer helping disabled people and with her husband, took over the running of her in-law's farm. The property, known as "Ferme du Château", is near Lausanne, and attached to the castle of Saint-Barthélemy. The farm assists people with mild to moderate intellectual disabilities, and people with depression or drug and alcohol problems. Here Wawrinka grew up with his elder brother, Jonathan, and his two younger sisters, Djanaée and Naélla, who are students and tennis players. Wawrinka attended the Rudolf Steiner School in Crissier.

Wawrinka started playing tennis at the age of eight, and played once a week until he was eleven, when he started to practice three times a week. Wawrinka stopped attending regular schooling at age 15 to focus full-time on tennis. However, he continued his schooling by distance education with the French organization CNED, which offered him greater flexibility.

Wawrinka turned professional in 2002 at the age of 17. He was coached from age eight until June 2010 by Dimitri Zavialoff. ...

Source: Article "Stan Wawrinka" from Wikipedia in english, licensed under CC-BY-SA 3.0.