Movie bout a guy that stopd fightin but has to start again only remember no rythm in feet and twirl a girl aro?

ok im looking for a movie its about a guy that stopped fighting i think its a boxing movie. the guy use to have no rythem in his eet when he fights thats what made him so good. and he dances with the girl and was like twirling her around himself. and he loses in the beginning to a fighter but in the end i beleive he wins.