Billie Jean King has urged Williams to pass Court 's 24 major victories and prove she is the greatest women 's player of all time .
Billie Jean King won six Wimbledon singles titles from 1966 to 1975 .
Billie Jean King , who won six Wimbledon singles titles from 1966 to 1975 , has urged Williams to pass Court 's 24 major victories and prove she is the greatest women 's player of all time .