The Jesus Chavez Documentary. Very good and very well done. If not for the attentention this documentary gave to Chavez he may not have been allowed back in the USA.
here are some good ones.
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WIDE ANGLE gains intimate access to the Havana Boxing Academy on the outskirts of Cuba's capital. There, from the tender age of nine, boys hand-picked as future Olympians are molded into soldiers of the ring. They live and train at the academy with a single purpose: to bring home Olympic Gold. Victory is Your Duty follows the boys' dramatic path over eight months of training, schooling and boarding as they build up to the biggest event of their lives -- the annual National Boxing Championships.
http://www.pbs.org/wnet/wideangle/shows/cuba/index.html