Short answers, pulled from the story.
Billie Jean King defeated 55-year-old Bobby Riggs 6-4, 6-3, 6-3 at the Houston Astrodome on the 20th of September 1973, winning $100,000. The match drew 30,492 spectators in person and a television audience estimated at 50 million in the United States and 90 million in 37 countries.
Billie Jean King won 39 Grand Slam titles in total: 12 in singles, 16 in women's doubles, and 11 in mixed doubles. She also won a record 20 career titles at Wimbledon alone, six in singles, ten in women's doubles, and four in mixed doubles.
Billie Jean King, born Billie Jean Moffitt, was born on the 22nd of November 1943 in Long Beach, California. She was raised in an athletic family and switched from softball to tennis at age 11.
Billie Jean King and eight other players boycotted because the 1970 Pacific Southwest Open offered men a top prize of $12,500 compared to just $1,500 for women. The boycott led them to organize their own women-only Virginia Slims invitational in Houston, which helped launch a separate women's tennis circuit.
Billie Jean King founded the Women's Tennis Association in 1973 and the Women's Sports Foundation in 1974. She also co-founded womenSports magazine with her husband Larry King in 1974 and later served as commissioner and majority owner of World TeamTennis.
Margaret Court was Billie Jean King's primary rival from 1966 through 1975, a period in which the two players combined to win 24 of the 40 Grand Slam singles tournaments held. Court defeated King in several major finals, including their last-ever singles match in 1973, and finished their head-to-head series with 21 wins to King's 13.