Duel of Fists

Two men, one a businessman skilled in Kung Fu, the other a kickboxer discover they are brothers, and together, both in and out of the ring, they must face a crime syndicate. One of the first films to use the martial art of Muay Thai.

• 
  Chang Cheh
• 
  Lee Kwok-Keung
• 
  Wang Yunhua
• 
  Liu Tien-Min

• 
  David Chiang Da-Wei
  Fan Ke
• 
  Ti Lung
  Wen Lieh
• 
  Ching Li
  Yu Lan
• 
  Wang Chung
  Mi Sai
• 
  Wong Chung
  Mi Sai
• 
  Chan Sing
  Chiang Ren
• 
  Canong Daech
  Miller
• 
  Ku Feng
  Chung Pao / Cannon
• 
  Pawana Chanajit
  Mai Dai
• 
  Lee Pang-Fei
  Chief Architect
• 
  Yau Ming
  Jin Long Student
• 
  Wang Kuang-Yu
  Thai Boxing Referee
• 
  Woo Wai
  Xu Qiu
• 
  Tang Ti
  Uncle Chen
• 
  Yang Chi-Ching
  Retired Fighter Drunkard
• 
  Ching Miao
  Fan Ke's Father
• 
  Chan Chuen
  Boxfight Cornerman (uncredited)
• 
  Chan Dik-Hak
  Jin Long Student (uncredited)
• 
  Chan Keung
  Lieh's Cornerman (uncredited)
• 
  Chan Siu-Kai
  Chiang Ren's Man (uncredited)
• 
  Cheung Chok-Chow
  Thai Boxing Judge (uncredited)