All the actors in TNT Boxerstory are amateurs.
Just like the title character TNT, legendary two-time world boxing champion Graciano Rocchigiani, who plays TNT, was part of boxing scams twice. Other than TNT, though, he was the victim in both cases: In1996, when he lost the fight against Dariusz Michalczewski undeservedly and in 1998, when the World Boxing Council (WBC) decided to give the light-heavyweight title to Roy Jones even though Rocchigiani won the title.
This is Graciano Rocchigiani's first and only film. Rocchigiani died tragically on October 1st 2018, just days before the German premiere of TNT Boxerstory.