Dois na Lona (1968)

MMA fights are at the height of popularity in the country. When watching a fight in a park, the manager of the champion fighter, the fierce Lobo, decides to invite a poor mechanic for a test fight. This rookie, with the help of his clumsy friend, a smart boy and his girlfriends, becomes the new sensation and ends up competing for the title belt with Lobo, who is not willing to lose the title and money of illegal betting from gang he commands.