Martina Navratilova is a person.
Martina Navratilova . She and Billie Jean King each won 20 Wimbledon titles , an all-time record . Over five consecutive seasons , she won 428 of 442 singles matches , averaging fewer than 3 losses per year to 87 wins , for a sustained winning percentage of 96.8 % . Navratilova reached 11 consecutive major singles finals , second all-time to Steffi Graf 's 13 , and is the only woman ever to reach 19 consecutive major semi-finals .