Of course I know both the legends. But I have never watched their games because I was born at 80s.
Espesially Billy Jean King chaged women's tennis.
At a very famous japanese tennis mannga エースを狙え!(Aim for the Ace!http://en.wikipedia.org/wiki/Aim_for_the_Ace!),
Billy Jean King and Chris Evert appear as the heroine's opponent.
I like Steffi graf the most. Her play style is very unique and fascinating