There’s video that exists of Venus and Serena Williams playing tennis when they were kids — 8 and 7, respectively — in the late ’80s, on unshaded but otherwise decent-looking public courts in California. This is not one of the clips you’ve maybe seen, taken from various news segments, but an earlier, stranger video, made by their father and longtime coach, Richard Williams, as a kind of audition tape for the tennis-instructional guru Vic Braden.

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