Andre Kirk Agassi (born April 29 1970) is a former World No. 1 professional American tennis player who won eight Grand Slam singles tournaments and an Olympic gold medal in singles. He is one of only five male players to have won all four Grand Slam singles events during his career. He is the only player in the open era to have won every Grand Slam singles title, to have won the Tennis Masters Cup, to have been part of a winning Davis Cup team, and to have won an Olympic gold medal. He won 17 ATP Masters Series tournaments, more than any other player. TENNIS Magazine has named him the 7th greatest male player from 1965 through 2005.

Because of sciatica caused by two bulging discs in his back, a spondylolisthesis (vertebral displacement), and a bone spur that interferes with the nerve, Agassi retired from professional tennis on September 3, 2006, after losing in the third round of the U.S. Open. Agassi is married to Steffi Graf and has two children. He is the founder of the Andre Agassi Charitable Foundation, which has raised over $60 million for at-risk children in Southern Nevada. In 2001, the Foundation opened the Andre Agassi College Preparatory Academy in Las Vegas, a K-12 public charter school for at-risk children.