Conversation so far:
Can you give me some information on the Player Compensation?
Billie Jean King criticized the United States Lawn Tennis Association, denouncing where top players were paid under the table to guarantee their entry into tournaments. King argued that was elitist.
What are some other key points to the career Grand Slam?
In early 1968, Billie Jean King won three consecutive tournaments to end her Australian tour. King won three Grand Slam singles titles in 1972.
Did Billie Jean King win anything else?
In 1966, Billie Jean King defeated Dorothy Dodo Cheney for the first time in five career matches, winning their semifinal at the Southern California Championships 6–0, 6–3.

Question: How popular was she?
Self-contained rewrite: How popular was Billie Jean King?