Billie Jean King was a tennis player.
Billie Jean King . In 1973 , at age 29 , she won the Battle of the Sexes tennis match against the 55-year-old Bobby Riggs , and was the founder of the Women 's Tennis Association , World TeamTennis ( with former husband Larry King ) , and the Women 's Sports Foundation . King was inducted into the National Women 's Hall of Fame in 1990 , and in 2006 , the USTA National Tennis Center in New York City was renamed the USTA Billie Jean King National Tennis Center . The Grand Slam tournaments , also called majors , are the four most-important annual tennis events .