Professional boxing usually runs on the 10-point must system: the round winner gets 10, the other fighter gets 9 or fewer if there is a knockdown, a point deduction, or a clear margin.
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Sugar Ray's perfect boxing explained

A technical breakdown of Sugar Ray Robinson’s complete boxing style, from his deceptive jab entries and brutal counters to ...
Rocky Marciano was more than just raw power and relentless pressure, he was a masterful technician whose unorthodox style ...