Birthday: 10/18/1956Birthplace: Revnice, Czechoslovakia [now Czech Republic]Occupation: SportSign: LibraCitizen has been described as the greatest female athlete of this century.Born in Prague, Czechoslovakia in 1956, Navratilova first visited the United States in in 1973. Two years later, she defected to the U.S., requesting political asylum. She became an American citizen in 1981.As a singles