Without question, the greatest female tennis player of all time was Margaret Court: With 62/63 Grand Slam titles to her name, she stands head and shoulders over the rest, and is one of the very few female players to win a true [full Calendar Year] Grand Slam. She is the best singles player, the best doubles player and the best mixed doubles player - the complete 'product'.
To boot, during this incredible career, she retired twice for family reasons and returned to again take up the leadership mantle.
Steffi Graf and, in second place, Martina Navratilova.
