A former No 1 World Champion Tennis player. 

A lifetime champion of equality. 

Venus Williams describes her as: "Billie is one of the most heroic pioneers that I have encountered and the success she has achieved in her life is proof that pressure is in fact, a privilege". 

John McEnroe said: "Billie's unbridled energy, enthusiasm, and intensity for anything she puts her mind to amazes me to this day....If we all cared that much, the world would be in better shape". 

Sources: 

Books: 

Pressure is a Privilege, Lessons I've learned from life and the Battle of the Sexes - Billie Jean King with Christine Brennan (2008, LifeTime Media, Inc)

Becoming - Michelle Obama (2018, Penguin, Viking)

Sisters in Law: How Sandra Day O.Connor and Ruth Bader Ginsburg Went to the Supreme Court and Changed the world by Linda Hirshman (Harper, 2015)

Music: 

Winds of Change, Nona Hendryx (1987)

Philadelphia Freedom (Remastered), Elton John (2018) First released 1975