Erik Morales (right) plays fellow Mexican great Vicente Saldivar
As Risen, the film of Howard Winstone's life, received its world premiere in Cardiff on Thursday, Eddie Avoth lauded his former training partner.
"It's about time a film was made of Howard's life," said the former British and Commonwealth light-heavyweight champion of Winstone, who died in 2000.
"He took some beating as a boxer and as a person."
Avoth has a part in the film as boxing promoter Jack Solomons, while Enzo Maccarinelli plays the role of Avoth.
"I've got a little role... Jack promoted both Howard and myself," Avoth told BBC Sport Wales.
They offered me the role of the foreman in Howard's factory who sacked him
Colin Jones on why he turned down a part in the film
"Enzo Maccarinelli is playing me - I'm the better looking but he may be the better actor!
"My memories are of so many times in that great gym in Merthyr under [trainer] Eddie Thomas with Howard, myself, Ken Buchanan they were great times to be in boxing.
"[In the film] you will see an honest opinion of Howard and his life.
"He was a very modest guy, that's what I liked about him. He never made out that he was as famous as he was."
Thursday's film premiere was the key event of the opening day of the WBC's three-day boxing extravaganza in Cardiff.
Avoth on Winstone and Risen
Friday sees a high-quality amateur boxing night with Team GB taking on the rest of the world.
The event culminates with the Night of Champions at the Cardiff International Arena on 31 July with over 80 former and current champions expected to attend, including Vitali Klitschko, Roberto Duran, Ken Buchanan and Joe Calzaghe.
Also present - and working with the GB boxing team - is Welsh boxing great Colin Jones.
The three-time world-title challenger from Swansea followed Winstone and Jones into the Thomas gym, but he revealed that he had no intention of taking the part offered to him in the film.
"They offered me the role of the foreman in Howard's factory who sacked him," Jones told BBC Sport Wales.
"I turned them down - I like going back to Merthyr!"
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