Martina Navratilova is a former professional tennis player known for her exceptional athleticism and sportsmanship. Born in Czechoslovakia in 1956, she became a naturalized American citizen in 1981. Navratilova won a record 18 Grand Slam singles titles and a total of 59 Grand Slam titles overall. She is widely regarded as one of the greatest tennis players of all time, known for her powerful serve and volley style of play. Off the court, Navratilova has been an outspoken advocate for LGBTQ rights and other social causes.