Raging Bull (1980)

It tells the story of middleweight boxer Jake La Motta (Robert De Niro). As La Motta rises through the ranks to earn his first shot at the middleweight crown, he falls in love with Vickie (Cathy Moriarty), a gorgeous girl from his Bronx neighbourhood. Jake's inability to express his feelings pours out in the ring and eventually takes over his life in his dealings with his brother, Joey (a brilliant Joe Pesci). Irrational jealousy over Vickie, as well as an insatiable appetite, sends him into a downward spiral that costs him his title, his wife, and his relationship with Joey.