Martina Navratilova won 18 Grand Slam singles titles, including a record 9 Wimbledon championships, across an Open-era-record 167 career singles titles overall. Born in Czechoslovakia, she defected to the United States in 1975 and went on to redefine the athleticism of the women's game, continuing to compete at the top level of doubles for years after her 1994 singles retirement.