Old American boxe film 40's or 50's

Hi, first of all sorry for my poor English. I am Italian and I am searching for a title of an old boxe film produced on 40 'or 50' a years. A watched this film 30 years ago and I desperately searching the title. I rember that this man was a boxeur and he loosed some matches because he sold the match to got money. I rember a scene where his wife or girlfriend see a n boxe match on TV with some other people. The match ends with his man the loose it. She takes a cigarette borning in an ashtray and crush it. Please help me to find the title! Thanks.