Raging Bull (1980)

Jake LaMotta (Robert De Niro) is a boxer that only knows how to use his fist, and we follow him through the process of becoming a champion, facing fame, failing marriage, and eventually losing it all but the memories from past. The neighbourhood where he grows up made him a though man, and his violent way to deal with problems was the main reason of his divorce. Ultimately he opens a bar to cash in the recognition he still has from the people and plays a comediant act, but ends up having problems when he unadvertently allows underage girls in the bar.