Martina Navratilova is a person.
Martina Navratilova . She and Serena Williams are the only Open Era players to have won six major singles crowns without the loss of a set . The pair set an all-time record of 79 titles together and tied Louise Brough Clapp 's and Margaret Osborne duPont 's record of 20 major women 's doubles titles as a team .