Steffi Graf won a tennis tournament.
The 1999 Wimbledon Championships -- Women 's Singles was the women 's singles event of the hundred-and-thirteenth edition of Wimbledon , the third Grand Slam of the year , the most prestigious tournament on grass courts , and the oldest tennis tournament in the world . The Grand Slam tournaments , also called majors , are the four most-important annual tennis events . Each tournament is played over a period of two weeks . Steffi Graf . Furthermore , she is the only tennis player to have won each Grand Slam event at least four times .