A Father's Fight (2021) on Netflix

Plot summary

Bo married his high school sweetheart Kacie and once boxed with promise. After high school he went the way of his father, and addiction replaced the marriage, the family and the career. Years of moving between jobs and towns have left him with nothing: Kacie has taken the children and gone, and his most recent employer has let him go. Sal, who has trained Bo for years, brings him an offer. Dylan, Bo's old high school rival and another of Sal's fighters, is ending a long professional career with a charity exhibition in their hometown, and he wants Bo in the other corner. Sal talks him into the bout, and turns the training toward Bo's marriage, his family and his faith.