Her 39 Grand Slam titles? A No. 1 world ranking for six years? Defeating Bobby Riggs in the “Battle of the Sexes” match in 1973? 

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None of the above, she says. For King, it’s the breakthroughs in her fight for equal pay that outshine her tennis accolades—and ultimately led her to advocate for gender equality beyond courts and stadiums.

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Today, King partners with organizations that share her vision, like Gainbridge, a digital platform providing simple, intuitive and accessible financial solutions. As sponsor of the Billie Jean King Cup (known as the women’s World Cup of tennis), Gainbridge ensures the competition’s prize money matches that of the men’s tournament equivalent. The company also recently collaborated with women experts in the financial industry to design a specialized suite of tools to support women in retirement, a demographic disproportionately burdened by income inequality.

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Explore King’s work below and learn why empowering retirement-aged women is part of her broader crusade for change.