Venus and Serena Williams’ ascent to stardom has transcended sports and moved into the forefront of popular culture. Serena recent appearance in Beyonce’s music video for “Sorry” demonstrates the extent to which the sisters have penetrated all facets of American society. While their supremacy is undisputed, it’s the sisters’ humble roots, hours of relentless practice, and their father–a man who wouldn’t stop pushing his daughters to greatness–that go largely unnoticed. In a form of poetic justice, their sibling rivalry transcended childhood practice to one of the most prolific tournaments in the world.