 is an investor in women's pro volleyball, which also has a social and club component to get girls interested in sports. And of course, she's still involved in tennis. A couple years ago, the Fed Cup, the female version of the Davis Cup in men's tennis, was renamed the Billie Jean King Cup in her honor and remains the largest annual women's sports event in the world. The National Tennis Center, where the US Open is held, was renamed for her.