Duel of Fists is a 1971 Hong Kong martial arts film directed by Chang Cheh and starring David Chiang and Ti Lung. Filmed on location in Bangkok, the story concerns a Hong Kong engineer (Chiang) who goes to Thailand to find his long-lost half-brother, who is a Muay Thai boxer.

David Chiang Tai-wai is a Hong Kong actor, director, producer and martial artist. A well-known martial arts actor formerly from Shaw Brothers Studio in the 1970s, he has appeared in over 130 films and 30 television series.