Jürgen Hartenstein
Himself

Aging German boxer Jürgen "The Rock" Hartenstein was once a middleweight champion. With no manager standing behind him, he is forced to train in city parks and in a dark, seedy attic in Munich with his African trainer, Markus Kone. Every week he phones matchmakers in the U.S., because he has a dream: he wants to make a comeback.
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