Billie Jean King, a former world No. 1 American tennis player, is considered among the greatest of all time. She secured 39 Grand Slam titles across singles (12), women's doubles (16), and mixed doubles (11). King also contributed to the United States' victories in seven Federation Cups and nine Wightman Cups. Beyond her athletic achievements, she is known for her advocacy of gender equality in sports and society.
In 1939, Alice Marble was the last woman to win the singles, women's doubles, and mixed doubles titles at both Wimbledon and the U.S. Championships before Billie Jean King matched the achievement in 1967.
On November 22, 1943, Billie Jean King, née Moffitt, was born. She became an American former world No. 1 tennis player and is considered one of the greatest of all time.
On January 28, 1948, Marilyn Barnett, who later had a relationship with Billie Jean King, was born as Marilyn Kathryn McRae.
From 1959, Billie Jean King made unsuccessful attempts to win a Grand Slam singles title.
In 1959, Billie Jean King made her Grand Slam debut at the U.S. Championships, marking the beginning of her journey in major tennis tournaments.
In 1959, Billie Jean King played in her first Grand Slam singles event.
In 1960, Billie Jean King won her first tournament at the Philadelphia and District Grass Court Championships, marking her first major victory.
In 1961, Billie Jean King gained international recognition by winning the Wimbledon women's doubles title with Karen Hantze in her first attempt.
In 1961, Billie Jean King graduated from Long Beach Polytechnic High School, marking a milestone in her early life and education.
In 1962 at Wimbledon, Billie Jean King upset Margaret Court, the World No. 1 and top seed, in a second-round match.
In 1963, Billie Jean King faced Margaret Court in the Wimbledon final, where Court prevailed in the match.
In 1963, Billie Jean King was on the winning United States team in the Federation Cup, contributing to the team's victory.
In 1964, Billie Jean King decided to make a full-time commitment to tennis after businessman Robert Mitchell offered to sponsor her training in Australia.
In 1964, Billie Jean King left Los Angeles State College (now California State University, Los Angeles) to fully dedicate herself to her tennis career.
On September 17, 1965, Billie Jean King married Larry King in Long Beach. They had become engaged while she was 20 and he was 19 and still attending school.
1969 was the first year since 1965 that Billie Jean King did not win at least one Grand Slam singles title.
In 1965, Billie Jean King defeated Ann Haydon-Jones in the Fed Cup to help the United States win against the United Kingdom.
In 1965, Billie Jean King returned to the Australian summer tour in December for the first time.
To 1965, Billie Jean King made unsuccessful attempts to win a Grand Slam singles title. Afterwards, she finally won the first of her six singles titles at Wimbledon.
In 1966, Billie Jean King began a period of dominance, achieving the year-ending World No. 1 ranking in six of the ten years through 1975.
In 1966, Billie Jean King started a Grand Slam rivalry with Margaret Court. Through 1975, One or both of these women played 35 of the 40 Grand Slam singles tournaments held during this period, and together they won 24 of them.
In 1966, Billie Jean King was on the winning United States team in the Federation Cup, contributing to the team's victory.
In 1966, Billie Jean King won her first Wimbledon singles title and the first of her twelve Grand Slam singles titles overall, defeating Maria Bueno in the final.
In 1967, Billie Jean King criticized the United States Lawn Tennis Association (USLTA) for its practice of "shamateurism," arguing it was corrupt and elitist.
In 1967, Billie Jean King successfully defended her title at the South African Tennis Championships. She also won her second consecutive Wimbledon singles title, defeating Virginia Wade in the quarterfinals and Jones. She won her first U.S. Championships title, winning the singles, women's doubles, and mixed doubles titles at both Wimbledon and the U.S. Championships.
In 1967, Billie Jean King was on the winning United States team in the Federation Cup, contributing to the team's victory.
Before the start of the open era in 1968, Billie Jean King earned US$100 a week as a playground instructor and student at California State University, Los Angeles when not playing in major tennis tournaments.
By 1968, Billie Jean King realized that she was attracted to women.
In early 1968, Billie Jean King won the Australian Championships for the first time. She won three consecutive tournaments to end her Australian tour. On September 24, 1968, she had surgery to repair cartilage in her left knee.
In May 1969, Billie Jean King's knee fully recovered from surgery.
In 1969, Billie Jean King lost to Margaret Court in the Australian Open final and lost in the quarterfinals of the US Open. King stated it was a bad year due to a severe tennis elbow for seven months.
In September 1970, during the Pacific Southwest Open where the prize money for men was significantly higher than for women, Billie Jean King and other women chose not to play to advocate for equal pay. King and the other women organized the women-only Houston Virginia Slims invitational and this helped launch the series of women-only tournaments.
Billie Jean King said during the Pacific Southwest Open, "I expect to have a real big year in 1970, though, because I really have the motivation now. I feel like a kid again."
Although Billie Jean King won only one Grand Slam singles title in 1971, this was the best year of her career in terms of tournaments won (17).
From 1971, Billie Jean King began a period of Grand Slam dominance, winning seven of the ten Grand Slam singles tournaments she played through 1975.
In 1971, Billie Jean King began an affair with her secretary, Marilyn Barnett.
In 1971, Billie Jean King campaigned for equal prize money in the men's and women's games. Her husband, Larry King created the idea to form a nine player women's group. She began an affair with her secretary, Marilyn Barnett.
In 1971, Billie Jean King had an abortion that was made public in a Ms. magazine article after Larry had revealed it without consulting her.
In 1971, Billie Jean King played in New Zealand, near Australia, but did not play in the Australian Open, because she did not want to miss any Virginia Slims winter tournaments.
In 1971, at Wimbledon, Billie Jean King lost unexpectedly to Evonne Goolagong in the semi-finals. Two weeks after Wimbledon, King won the Rothmans North of England Championships on grass in Hoylake.
In August 1971, Billie Jean King won the US Open without losing a set. In 1971, King was the first female tennis player to earn $100,000 a year, earning a congratulatory phone call from President Richard M. Nixon.
In 1972, Billie Jean King jointly won the Sports Illustrated Sportsperson of the Year award with John Wooden, acknowledging her impact and accomplishments in the world of sports.
In 1972, Billie Jean King won the French Open, completing a "career Grand Slam" by winning the singles titles at all four Grand Slam events. She became only the fifth woman in tennis history to achieve this.
In 1972, Billie Jean King won the US Open but received US$15,000 less than the men's champion Ilie Năstase, highlighting the inequalities in prize money.
In 1972, Billie Jean King won three Grand Slam singles titles, choosing not to play the Australian Open. Her dominance was aided by rival Margaret Court's absence due to childbirth.
In early 1972, Billie Jean King admitted that cramps associated with an abortion caused her retirement from a match with Chris Evert.
On September 20, 1973, Billie Jean King defeated Bobby Riggs in the "Battle of the Sexes" at the Houston Astrodome, in front of over 30,000 spectators and a large television audience. This match is considered a significant event in developing greater recognition and respect for women's tennis.
In 1973, Billie Jean King became the first president of the women's players union – the Women's Tennis Association.
In 1973, Billie Jean King completed the Triple Crown at Wimbledon and also played the Battle of the Sexes match against Bobby Riggs, winning after playing matches directly before and after the event. King also won tournaments in Phoenix, Hawaii, and Tokyo at the end of 1973.
In 1973, Billie Jean King defeated Bobby Riggs in an exhibition match known as the Battle of the Sexes, winning $100,000.
In 1973, Billie Jean King defeated Margaret Court in the Virginia Slims of Indianapolis tournament, ending Court's 12-tournament and 59-match winning streak after saving multiple match points. King later won her fifth Wimbledon singles title.
In 1973, Billie Jean King's husband Larry co-founded World Team Tennis. WTT was based on her philosophy for gender equality.
In 1973, Billie Jean King, at the age of 29, famously won the "Battle of the Sexes" tennis match against 55-year-old Bobby Riggs. This event was a significant moment in the fight for gender equality in sports.
In 1973, due to Billie Jean King's efforts, the US Open became the first major tournament to offer equal prize money for men and women.
In 1974, Billie Jean King, along with husband Larry King and Jim Jorgensen, founded womenSports magazine and started the Women's Sports Foundation.
In 1974, World Team Tennis began.
In 1975, Billie Jean King was recognized as one of the Time Persons of the Year, highlighting her influence and significance in society.
Through 1975, Billie Jean King continued a Grand Slam rivalry with Margaret Court. Since 1966, one or both of these women played 35 of the 40 Grand Slam singles tournaments held during this period, and together they won 24 of them.
Through 1975, Billie Jean King had achieved the year-ending World No. 1 ranking in six of the ten years since 1966, highlighting her dominance in women's tennis.
Following surgery in November 1976, Billie Jean King spent the first three months of the year rehabilitating her right knee.
In 1976, Billie Jean King considered her return to singles competition after watching the Wimbledon final. King had knee surgery for the third time on November 9, 1976.
In 1976, Billie Jean King was on the winning United States team in the Federation Cup, contributing to the team's victory.
In March 1977, Billie Jean King requested a wild card entry to the Virginia Slims Championships and played in the Lionel Cup tournament in San Antonio, which faced criticism due to the presence of Renée Richards, a transgender athlete. King won the San Antonio tournament.
In 1977 at Wimbledon, Billie Jean King was defeated by Chris Evert in the quarterfinals. This marked the first time King didn't reach a final at Wimbledon since her debut in 1961.
In 1977, Billie Jean King recalled that in 1968, her doctors predicted that her left knee would only allow her to play competitive tennis for two more years.
In December 1978, Billie Jean King underwent major surgery to her left foot.
Due to major foot surgery in December 1978, Billie Jean King played only one event - doubles in the Federation Cup tie against Spain - during the first half of 1979.
In 1979, Billie Jean King played Tracy Austin at Wimbledon. King lost to Austin in the quarterfinal.
In 1979, Billie Jean King was on the winning United States team in the Federation Cup, contributing to the team's victory.
In 1979, several top players were asked who they would pick to help them recover from a hypothetical deficit of 1–5 (15–40) in the third set of a match on Wimbledon's Centre Court. Martina Navratilova, Rosemary Casals, and Françoise Dürr all picked Billie Jean King.
In 1979, the Kings asked Marilyn Barnett to leave their house, leading to threats and a lawsuit.
In May 1981, Marilyn Barnett sued the Kings in a palimony lawsuit for half their income and the Malibu house.
In December 1981, a court order stipulated that Marilyn Barnett leave the house and her threats to publish private correspondence came close to extortion.
In 1981, Billie Jean King teamed with Navratilova to win King's 39th and final Grand Slam title at the US Open. Navratilova ended their partnership in the Spring of 1981.
In November 1982, Marilyn Barnett's palimony suit was thrown out of court.
In 1982, Billie Jean King became league commissioner for World TeamTennis.
In 1982, Billie Jean King began a comeback, winning the Edgbaston Cup, her first singles title in more than two years. At Wimbledon, the 38-year-old King reached the semi-finals, becoming the oldest female semi-finalist since 1920, after defeating Tracy Austin in the quarterfinals. She was eventually defeated by Chris Evert in the semi-finals. King finished 1982 ranked 14th in the world.
In her 1982 autobiography, Billie Jean King claimed that she intentionally lost a match in Long Beach because of an argument with her husband.
In March 1983, the house that had been contested in the palimony suit was destroyed during a series of freak storms.
In 1983, Billie Jean King played in her last Grand Slam singles event.
In 1983, Billie Jean King reached the semi-finals in her final appearance at Wimbledon, losing to Andrea Jaeger after beating Kathy Jordan in the quarterfinals.
In 1983, Billie Jean King won the Edgbaston Cup, becoming the oldest WTA player to win a singles tournament. Her final official singles match was a loss to Catherine Tanvier at the 1983 Australian Open.
In 1984, Billie Jean King and Vijay Amritraj were seeded sixth for the Wimbledon mixed doubles, but they withdrew before the tournament began.
In 1984, Billie Jean King became a major owner in World TeamTennis.
In 1987, Billie Jean King and Larry King divorced after Billie Jean fell in love with her doubles partner, Ilana Kloss. They remained close friends afterward.
In 1987, Billie Jean King was inducted into the International Tennis Hall of Fame, recognizing her exceptional career and contributions to the sport.
In March 1990, Billie Jean King retired from competitive play in doubles. In her last competitive doubles match, King and her partner lost a second round match.
In 1990, Billie Jean King was inducted into the National Women's Hall of Fame, honoring her as a pioneer and role model for women.
In 1996, Billie Jean King guided the United States to the Fed Cup championship as team captain.
In 1999, Billie Jean King was elected to serve on the board of directors of Philip Morris Incorporated, garnering some criticism.
In 2002, Billie Jean King dismissed Capriati from the Fed Cup team for violating rules about personal coaches, sparking controversy.
In 2006, the USTA National Tennis Center in New York City was renamed the USTA Billie Jean King National Tennis Center, a tribute to her lasting legacy and contributions to tennis.
In 2008, Billie Jean King became a member of the Board of Honorary Trustees for the Sports Museum of America, which is the home of the Billie Jean King International Women's Sports Center.
In 2008, Billie Jean King published the book "Pressure is a Privilege: Lessons I've Learned from Life and the Battle of the Sexes".
In 2010, Billie Jean King was honored with the Fed Cup Award of Excellence, celebrating her outstanding achievements and dedication to the Federation Cup competition.
As of 2012, Billie Jean King was involved in the Women's Sports Foundation, the Elton John AIDS Foundation, and served on the President's Council for Fitness, Sports and Nutrition.
In December 2013, US President Barack Obama appointed Billie Jean King to represent the United States at the 2014 Winter Olympics in Sochi, Russia as a signal on gay rights.
On February 7, 2014, the day of the 2014 Winter Olympics opening ceremony, Billie Jean King's mother, Betty Moffitt, died.
On June 16, 2017, Billie Jean King delivered the Northwestern University commencement address in Evanston, Illinois.
In 2017, Billie Jean King sold her majority ownership stake of the World Team Tennis league.
In September 2018, Billie Jean King and Ilana Kloss became minority owners of the Los Angeles Dodgers baseball team.
On October 18, 2018, Billie Jean King married Ilana Kloss in a secret ceremony officiated by former New York City Mayor David Dinkins.
In 2018, Billie Jean King attended the 75th Golden Globe Awards as a guest of Emma Stone.
In 2018, Billie Jean King received the BBC Sports Personality of the Year Lifetime Achievement Award, celebrating her extraordinary career and impact on sports.
In October 2020, Billie Jean King and Ilana Kloss became part of the ownership group of Angel City FC.
In 2020, the Federation Cup was renamed the Billie Jean King Cup in her honor, recognizing her immense contributions to the sport and her role as a global icon.
In May 2022, the Mark Walter Group and BJK Enterprises entered a partnership with the Professional Women's Hockey Players Association (PWHPA).
In 2022, Billie Jean King was awarded the French Legion of Honour, one of France's highest honors, in recognition of her achievements and contributions.
On June 29, 2023, the Mark Walter Group and BJK Enterprises purchased the intellectual property and other key elements of the Premier Hockey Federation (PHF).
In 2023, Billie Jean King competed in season ten of The Masked Singer as "Royal Hen".
On January 1, 2024, the new league began with the first game played between New York and Toronto in Toronto.
In 2024 terms, Billie Jean King saved $8 to buy her first racket, which would be equivalent to $92.40.
In 2024, Billie Jean King received a Congressional Gold Medal, one of the highest civilian awards in the United States, honoring her achievements and contributions to society.