Alfred Cheung Kin-Ting (Chief Huang),
Yu Kang (Kane Luo),
Billy Lau Nam-Kwong (Gladys' Father),
Mike Leeder (Big Mike MMA Manager),
Felix Lok Ying-Kwan (Guan's Father),
Woo Fung (Fang Shu Ren),
Donnie Yen (Henry Chen Xia),
Lockhart Ogilvie (Locki MMA Fighter),
Joe Chen (Miss Liang),
Jess Liaudin (David Jones),
Brahim Achabbakhe (Assistant Boxer Trainer),
Bruce Tong Kwan-Chi (Bruce Guan),
Gladys Li (Gladys Wang), Dominic Lam Ka-Wah (Patrick Lin), Teresa Lee Fung (Jack's Grandmother), Benjamin Au-Yeung Wai-Ho (Ben Sir), Koo Tin-Lung (Boss Zhang), Lok Ming-Kit (Jack Li), Chris Kwan-Yiu Tong (Chris Guan), Gordon Chiu-Kin Lau (Gordon Xiang)
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