This reminded me quite a lot of "Rocky IV" (1985) only instead of a Russian auto-box doing the challenging, it's "Damian" (Jonathan Majors). Former champion "Adonis" (Michael B. Jordan) is living the life of a retired sportsman, wealthy and happy with his family whilst managing the gym with "Duke" (Wood Harris). Leaving, one afternoon, he discovers a guy sitting on his car and after a quick chat realises that it's his long-lost childhood pal who has been incarcerated for the last eighteen years. He ("Damian") is now determined to succeed in the ring and so his friend tries to sort it all out -... read the rest.