Andre Kirk Agassi is an American retired professional tennis player and former world no. 1. His impressive sports profile proves that he was one of the game's most dominant players in Tennis. In singles tennis, Agassi is an eight-time Grand Slam champion who competed in 15 Grand Slam finals and a 1996 Olympic gold medalist. His four Australian Open titles are an Open Era record. He is one of four male singles players to achieve the Career Grand Slam in the Open Era; the first of two to achieve the Career Golden Slam; and the only man to win the Career Golden Slam and the ATP Tour World Championships. He also won 17 ATP Masters Series titles and was part of a winning Davis Cup team in 1990 and 1992. Though he had a slight fall from grace during the mid-to-late 1990s, he got back up on the horse in 1999 and enjoyed the most successful run of his career over the next four years. He has been married to fellow tennis star Steffi Graf since 2001. He is the founder of the Andre Agassi Charitable Foundation which has raised over $60 million for at-risk children in Southern Nevada. Agassi has been called the best service returner in the history of the game.