Stan Wawrinka is a Swiss professional tennis player. He has won three Grand Slam singles titles, including the 2014 Australian Open, 2015 French Open, and 2016 US Open. He also reached the final of the 2017 French Open and 2018 Australian Open. Wawrinka has been ranked as high as No. 3 in the world by the Association of Tennis Professionals (ATP). He is known for his powerful one-handed backhand and his aggressive style of play.