Martina Navratilova is a retired professional tennis player from the Czech Republic, widely regarded as one of the greatest female tennis players of all time. Her career, spanning from the late 1970s to the early 1990s, saw her win a total of 18 Grand Slam singles titles and 31 Grand Slam doubles titles. Known for her activism, she has been a prominent advocate for LGBTQ+ rights and has used her platform to promote social justice issues.