Dean Treml/Getty ImagesMartina Navratilova is considered to be one of the best female tennis players in history. She is the only player to be ranked No. 1 in singles (332 weeks) and doubles (237 weeks) for more than 200 weeks. She won 18 Grand Slam singles titles, a record 31 major women's doubles titles, and 10 major mixed doubles titles.
She won the Wimbledon women's singles title a record nine times, including six consecutive titles, which is regarded as the best performance by a player at a major event.
Navratilova is one of only three women to achieve a career Grand Slam in women's singles and doubles, and mixed doubles, which consists of every senior Grand Slam title. Over five seasons, from 1982-86, she won 428 out of 442 singles matches. She owns the best single-season win-loss record in the Open Era, going 86-1 in 1983, as well as the longest winning streak with 74 consecutive wins.
Navratilova came out as bisexual in 1981 and has been an activist for gay rights, along with animal rights, and underprivileged children. However, she has also been criticized for making "transphobic" comments.