Rocky

Boxing movies are popular because of the passion behind the sport itself, so boxing in film acts as metaphor for the human condition. 

Just like life, boxing is about hard work, dedication, and perseverance against the odds. Following a boxer's journey let's an audience share in the pain, the lose, and the triumphant victory of the hero. Whether it's an old classic or one of the more recent boxing movies like The Fighter, Southpaw, and Creed. there's a lot to love about watching a boxer trying to fight his way to the top. 

Reference: https://m.ranker.com/list/boxing-movies-and-films/reference?ref=also_ranked&pos=45&a=0&l=1927136&ltype=n&g