Stanislas "Stan" Wawrinka (French: ; born 28 March 1985) is a Swiss professional tennis player. He reached a career-high Association of Tennis Professionals (ATP) world No. 3 singles ranking for the first time on January 27, 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 on all three occasions, and an ATP World Tour Masters 1000 title at the Monte-Carlo Masters in 2014, as well as two other finals at the 2008 Rome Masters and 2013 Madrid Masters.