On September 20, 1973, 90 million people watched Billie Jean King play tennis against Bobby Riggs in the Houston Astrodome. Riggs was fifty-five, a former Wimbledon champion, and a self-described male chauvinist pig who had been loudly proclaiming that women's tennis was inferior and that no woman could beat him. King was twenty-nine, the top-ranked women's player in the world, and absolutely furious. She won in straight sets, 6-4, 6-3, 6-3. It was the most watched tennis match in history. It was also, for millions of women who watched it, the first time they had seen a woman publicly defeat a man at anything on national television. The score was irrelevant. The audience was everything.

The Battle of the Sexes Was Not About Tennis

Bobby Riggs had already beaten Margaret Court, the Australian champion, in a prior match. Court played nervously and lost badly. The pressure on King was enormous. If she lost, the narrative would harden: women's sports are inferior, women cannot compete with men, equal pay for female athletes is unjustified. Riggs knew this and exploited it relentlessly, playing the role of the aging chauvinist to maximum media effect. Sports historians at the LA84 Foundation have documented that King understood the match was political theater. She treated it as a performance as much as a competition. She entered the Astrodome on a gold litter carried by men dressed as ancient slaves. Riggs arrived in a carriage pulled by models. The spectacle was deliberate. King knew that winning on the court mattered less than winning in the minds of the millions watching at home. Here is the thing about the Battle of the Sexes that gets simplified too easily. King was not just playing for equal respect. She was playing for equal money. Women's prize money in professional tennis was a fraction of men's. King had been fighting for pay equity for years, and the match was the loudest megaphone she could find.

She Founded a League Because Nobody Would Give Her One

In 1970, King and eight other women tennis players, known as the Original Nine, broke away from the existing tennis establishment to form their own tour. They signed one-dollar contracts with promoter Gladys Heldman and played a tournament in Houston sponsored by Virginia Slims cigarettes. The prize money was $7,500. The establishment threatened to ban them from major tournaments. Researchers at the International Tennis Hall of Fame have noted that the Original Nine's rebellion was the direct origin of the Women's Tennis Association, which King co-founded in 1973. Before the WTA, women's professional tennis was an afterthought. After it, women's tennis became one of the most popular spectator sports in the world. King's genius was organizational. She did not just win matches. She built institutions. She understood that individual victories fade from memory but organizational structures persist. The WTA, Title IX advocacy, the Women's Sports Foundation, all of these exist in part because King recognized that changing a system requires more than talent. It requires infrastructure.

She Was Outed and Survived It

In 1981, King was publicly outed as having had a relationship with her former secretary. The revelation cost her endorsement deals, public support, and years of personal anguish. She had been married to Larry King and was not publicly out. The outing was involuntary and financially devastating. LGBTQ sports historians at the University of Leicester have documented that King's response to the outing, initially defensive, eventually evolved into full public advocacy for LGBTQ rights in sports. She came out fully in the late 1990s and has since been one of the most prominent voices for inclusion in athletics. I think about Billie Jean King when I think about what courage looks like over a lifetime. The Battle of the Sexes was one night. The fight for equal pay, equal representation, and the right to be openly yourself in professional sports took fifty years. She is still fighting. The institutions she built are still standing. And the match in Houston, watched by 90 million people, is still the moment when a lot of people realized that the game was never just about tennis.