Night Parade

Night Parade is a 1929 American PreCode drama film directed by Malcolm St. Clair based on the play Ringside by Hyatt Daab, Edward Paramore, Jr. and George Abbott. Released by RKO Pictures in October 1929, it starred Hugh Trevor, Aileen Pringle, Dorothy Gulliver and Robert Ellis.

Over the course of several meetings between Paula and Bobby, she eventually, through seduction and alcohol, gets him to agree to purposely lose. Durham, through his connections, learns of Zellis plot, and tells Tom what Bobby agreed to. Tom confronts Bobby, who confesses, after which he learns that a childhood friend, Doris OConnell, who he always had feelings for, also has feelings for him.Unsure of what to do, Bobby goes to the fight. Meanwhile, his father, Tom, goes to have a little meeting with Zelli, and makes sure that Zelli wont bother Bobby again. As the fight progresses, Bobby is on the verge of losing. But as he is knocked to the canvas a last time, he sees his father and Doris arrive ringside, giving him the courage to get up and win the fight. ........

Source: Wikipedia