Billie Jean King has been an inspiration for gay people, and especially gay women, in sport for well over thirty years. In a time where gay people were still subject to horrific discrimination, tennis legend King had the confidence to declare that she was gay all the way back in 1981. She was the first significant female athlete in any sport to declare herself as a lesbian.
Her hand was forced with the declaration due to a palimony lawsuit filed by her former secretary Marilyn Barnett, who she'd been having an affair with since the 1960s. Coming out cost her over $2m in sponsorship revenue as partners pulled out, but she continued playing in defiance, going on to become the oldest player ever to win the Edgbaston Cup in 1983. Today, she's recognized as one of the greatest tennis players of all time and remains an activist for both women's and gay rights.