Andre Kirk Agassi (/ˈæɡəsi/ AG-ə-see; born April 29, 1970) is an American retired professional tennis player and former world No. 1 whose career spanned from the late 1980s to the mid-2000s. In singles, Agassi is an eight-time Grand Slam champion and a 1996 Olympic gold medalist, as well as being a runner-up in seven other Grand Slam tournaments. During the Open Era, Agassi was the first male player to win four Australian Open titles, a record that was later surpassed by Novak Djokovic when he won his fifth title in 2015, and then by Roger Federer in 2017. Agassi is one of five male singles players to achieve the Career Grand Slam in the Open Era and one of eight in history, the first of two to achieve the Career Golden Slam (Career Grand Slam and Olympic Gold Medal, the other being Rafael Nadal), and the only man to win the Career Golden Slam and the ATP Tour World Championships: a distinction dubbed as a "Career Super Slam" by Sports Illustrated.