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They arrived like an earthquake that shook the foundation of the country-club atmosphere of tennis, a one-two punch of unnaturally gifted, unapologetically Black athletes who gained victories at the hallowed grounds of Wimbledon and the U.S. Open.

But while Venus and Serena Williams changed the face of the sport as they progressed from upstarts to unquestioned champions to revered veterans, they remained unchanged in their devotion to one another, their sisterly love lifting them through personal challenges, public failures and numerous heated battles for on-court bragging rights.

Serena tried to copy Venus when they were children

By now, much has been made of the girls' entry into tennis through the unorthodox methods of

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