Can someone help me with the title of a movie ?

I remember a young guy was boxing a big butterbean looking dude who kept lowering his head so the young guy kept punching his head and hurting his hands. It had to be a late 80's, early 90's movie. I think the young guy had a girl rooting for him in the stands.I thought about this in the shower earlier and it's been driving me insane all day. via /r/movies http://ift.tt/2tuC3nk