Graf, Stef ‧ fi /ɡræf, ˈstefi/ BrE AmE
(1969–) a German tennis player who won the four most important women's competitions, an achievement called the Grand Slam, in 1988, and won the women's SINGLES competition at Wimbledon seven times. She ↑ retire d in 1999, and in 2001, she married the tennis player Andre Agassi.