Billie Jean is a tennis player.
Billie Jean King ( née Moffitt ; born November 22 , 1943 ) is an American former World No. 1 professional tennis player . Regarded by many in the sport as one of the greatest tennis players of all time , King was inducted into the International Tennis Hall of Fame in 1987 . The Grand Slam tournaments , also called majors , are the four most-important annual tennis events . The Wightman Cup was an annual team tennis competition for women contested from 1923 through 1989 ( except during World War II ) between teams from the United States and Great Britain .