Trailblazer. Champion. Activist. Hero. There aren’t enough words to describe Billie Jean King’s impact on sports and society. Heralded by her peers as the most competitive tennis player ever, Billie Jean King won 39 Grand Slam titles in her career. In 1973, she both defeated Bobby Riggs in the Battle of the Sexes and founded the WTA, cementing her superstar status while setting the foundation for the future of her sport. Always ahead of her time, BJK defeated countless opponents, none more important than the status quo. From pressuring the US Open into becoming the first Grand Slam to offer equal prize money to women, to founding the Women’s Sports Foundation, to becoming the first woman commissioner in professional sports when she co-founded and led the World TeamTennis League, Billie Jean King proved herself a champion in everything she did.