Court is one of only three players to have achieved a career "boxed set" of Grand Slam titles, winning every possible Grand Slam title – singles, women's doubles and mixed doubles – at all four Grand Slam events. The others are Doris Hart and Martina Navratilova. Court, however, is the only person to have won all 12 Grand Slam events at least twice. She also is unique in having completed a boxed set before the start of the open era in 1968 and a separate boxed set after the start of the open era.