10,000 Hours of Play by OP Hero: Billie Jean King

On a September night in 1973, a 29-year-old tennis player was carried into the Houston Astrodome on a litter, like Cleopatra, while a 55-year-old hustler waited at the net to humiliate her on live television. Ninety million people around the world were watching. Bobby Riggs had already crushed the top-ranked woman in tennis four months earlier, and he had spent the weeks since telling any reporter who would listen that women belonged in the bedroom and the kitchen.

Billie Jean King beat him in straight sets: 6–4, 6–3, 6–3.

The match was never really about Riggs. King had already worked out something most champions never do: the trophy is not the prize. The prize is the power the trophy hands you to rewrite the rules of the game itself. For two decades she turned backhands into leverage, then spent it building a fairer system for every woman who picked up a racket after her.

Here is what her build looks like when you run it through the 10,000 Hours of Play framework.

About Yu-kai Chou

Yu-kai Chou is the author of 10,000 Hours of Play — the book that treats your life as the most important game you’ll ever build a character in, and gives you the 6-Step framework (Game · Attributes · Role · Skills · Allies · Quests) to play it on purpose. He has spent two decades developing the system through which this post analyzes its OP Hero, and applies it to his own life and to the lives of the people he advises around the world.

Chou’s other framework, the Octalysis Framework, has been applied by LEGO, Microsoft, Porsche, Coca-Cola, Salesforce, and MrBeast, impacting over 1.5 Billion Users. He has taught the methodology at Harvard, Stanford, Yale, Tesla, Google, BCG, and IDEO, and has advised governments in eight nations including Ukraine, the United Kingdom, the Kingdom of Bahrain, Singapore, Taiwan, the Netherlands, Kazakhstan, and South Korea.

His work has been cited by Harvard, Stanford, MIT, Forbes, Wall Street Journal, Wired, US Department of Energy, NIST, NSF, NCBI, US Department of Education, ClinicalTrials.gov, and Google Scholar — with 3,700+ more academic publications. Explore his books here.

What I find instructive about Billie Jean King’s build is that she refused to separate winning from changing the rules. Most high performers treat the two as different careers: first you dominate, then maybe you give back. King ran both at once, and that is the lesson I would lift from her. The moment you gain leverage in any game is the exact moment to spend it on the rules, before the system quietly teaches you to settle for the trophy.

Step 1: The Game King Was Actually Playing

Ask most people what Billie Jean King’s game was and they will say tennis. They are describing the board, not the game.

Her actual game, the one she chased across decades, was fairness through access. She wanted women in sport to be paid like the athletes they were, governed by a structure they controlled, and visible enough that the next generation of girls would never have to ask permission to compete. Tennis was the arena she happened to be the best in, so tennis became the lever.

This is exactly the move the 10,000 Hours of Play framework is built to surface. Step 1 asks what game you are truly playing underneath the obvious one, because the answer reshapes every decision after it. A player optimizing for trophies signs the biggest endorsement deal and keeps her head down. A player optimizing for a fairer system does the opposite: she uses each trophy as a bargaining chip and risks the endorsements to win the rule change. King kept choosing the second option, which is why she has 39 Grand Slam titles and a tennis stadium named after her, but is remembered for neither.

Once you see the real game, her strangest career decisions stop looking strange. They were all the same move.

Step 2: Attributes — The Innate Stats

Attributes are the stats you are largely born with, the traits visible long before anyone trains them. King’s were loud from the start.

The first was raw competitive drive. She sustained an elite career across more than two decades and 39 major titles, including a record 20 Wimbledon championships across singles, doubles, and mixed. That is not a hot streak. That is an engine.

The second was a willingness to gamble in public. The defining moments of her life were not careful, lawyered plans; they were live ultimatums and breakaway leaps made with her own name on the line. The third was vision: she kept describing tennis as a platform for change at a time when her peers were describing it as a living. The fourth was a coalition instinct, an almost reflexive pull toward “we” instead of “me,” which is rare in a sport built on solo dominance.

If you want to map your own innate stats the way King’s are mapped here, the OP Talent Triangle method is the diagnostic the framework uses. The point of Step 2 is not to admire a hero’s gifts. It is to find your own, because the rest of the build is just deploying them on purpose.

Step 3: Role(s) — The Character Class Across Chapters

One of the quiet lessons of King’s life is that you are allowed to change class. The hero who wins the early game is rarely the same character who wins the late one.

She started as the Champion, the on-court force who simply had to be the best to earn a hearing. Then she became the Organizer, the union-builder who convinced rivals to pool their clout. From there she stepped into the Activist, the figure willing to stake her reputation on a televised spectacle to make a public argument. Later she was the Institution-Builder, co-founding the Women’s Sports Foundation and World TeamTennis so the gains would outlive her own playing career. Today she plays the Elder, a civic figure whose endorsement still moves the sport.

This arc echoes a sibling in the OP Hero roster: Serena Williams ran a similar progression from dominant champion to businesswoman and advocate. The pattern is not a coincidence. Athletes who treat their prime as a platform rather than a peak tend to graduate into roles their trophies alone could never have unlocked.

Step 4: Skills — The Real-Life Game Skills She Mastered

Step 4 is where raw attributes get forged into trained technique, what the framework calls moving along the Skills Spectrum. King’s technical genius on the court is well documented. The skills worth studying are the ones she used off it.

She was a master of Heroic Strike (Warrior), the bold statement that forces a binary choice. After winning the 1972 US Open and pocketing $15,000 less than men’s champion Ilie Nástase, she told officials plainly that she would not return unless the prize money was equal. The following year, the US Open became the first major to pay both singles champions the same $25,000.

She paired it with Concord of Elements (Druid), the skill of bringing parties of different interests together. In 1970 she helped persuade eight other players to sign symbolic $1 contracts and break away from the tennis establishment. In 1973 she helped unify a fractious field of professionals under a single governing body, the Women’s Tennis Association.

The Battle of the Sexes showcased Wildfire Spark (Ranger), mastery of viral attention. King understood the Riggs match was a broadcast first and a tennis match second. She accepted the circus, the Astrodome, and the prime-time stage, then delivered the most-watched tennis event in history as evidence that women’s tennis could command a stadium.

Underneath all of it ran Terraform (Warlock), the skill of influencing rule-makers to change the landscape itself. Equal prize money, a sanctioned tour, and her years of advocacy for Title IX rewrote the rules every player now competes under. To do that while still being attacked, she needed Aegis (Paladin), the discipline to ignore the naysayers mid-quest; she played Riggs knowing a loss would be used to roll back everything she had built. And when the worst arrived, she drew on Phoenix Rebirth (Paladin), the skill of recovering from devastating failure and returning stronger.

Step 5: Allies — The People Who Multiplied Her

No one terraforms a sport alone. King’s power came from the people she pulled into the quest.

The first were the eight players who signed those $1 contracts with her in 1970, the group history remembers as the Original Nine. Their collective defection is the structural reason a modern women’s tour exists at all; one star walking out is a tantrum, nine walking out together is a movement.

Gladys Heldman, the tennis promoter and magazine publisher, supplied the operational muscle King’s star power needed, organizing the breakaway events and lining up the Virginia Slims sponsorship that kept the fragile tour alive. Rosie Casals was both a doubles partner and a fellow agitator, in the trenches for the early fights. And Larry King, her husband at the time, co-founded the institution-building ventures, World TeamTennis and the Women’s Sports Foundation, that turned a protest movement into durable structure.

The lesson of Step 5 is unglamorous but exact: a champion is a soloist, but a system requires a band. King kept recruiting people whose skills covered the gaps in her own.

Step 6: Quests — The Milestones That Shaped the Saga

Run her timeline as a quest log and the shape of the build is obvious. Each milestone bought leverage for the next.

In 1970 came the breakaway: nine players, nine dollar-contracts, one independent tour. In 1971 she became the first woman athlete to earn more than $100,000 in prize money in a single season, hard proof that the women’s game had commercial value. In 1972 she turned a US Open paycheck that trailed the men’s by $15,000 into the ultimatum that produced equal prize money the very next year. In 1973 she founded the WTA and took its first presidency, then walked into the Astrodome and beat Bobby Riggs in front of roughly 90 million viewers.

Then came the setback every honest quest log includes. In 1981 a palimony lawsuit publicly outed King, and she lost nearly all of her endorsement income almost overnight, at a time when no prominent athlete was openly gay. It would have ended most careers and most reputations. Instead it became the failure she rebuilt from, eventually emerging as one of the most respected and decorated figures in sports, awarded the Presidential Medal of Freedom in 2009 and honored with the US Open’s home court renamed in her name.

Her run is one of the most complete in the OP Hero profiles precisely because it includes that fall. The comeback is the proof that the rest was not luck.

What You Can Steal From Her Build

You will probably never serve for a Wimbledon title. The transferable part of King’s build was never the forehand.

The first thing to steal is her timing. She spent leverage the moment she earned it, not after she felt safe. Most of us hoard our small wins, waiting for a security that never quite arrives; King treated every trophy as currency to be spent immediately on the rule she actually cared about.

The second is her insistence on building structure, not just winning arguments. A protest fades. A tour, a union, and a foundation compound for fifty years. When you finally have leverage in your own game, ask whether you are using it to score a point or to change a rule, because only one of those outlasts you.

It is the same move you can trace in Malala Yousafzai and the rest of the heroes who converted a personal platform into a system that protects the people behind them. King just did it with a tennis racket, and did it loudly enough that the rest of sport had to follow.

Where this framework comes from

Related Reading

• All OP Hero Profiles — the full roster of legendary builds run through the 10K HP framework.
• OP Hero: Serena Williams — another champion who turned dominance into a platform.
• OP Hero: Ruth Bader Ginsburg — a fellow architect of women’s equality, one case at a time.
• OP Hero: Malala Yousafzai — turning a personal platform into a global movement.
• The 10,000 Hours of Play Framework — the 6 Steps for treating your life as a game you play on purpose.
• The OP Talent Triangle Method — how to map your own innate attributes.

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