T. it.: Charlot e Fatty boxeurs; Scen.: Charles Chaplin; F.: Frank D. Williams; Int.: Roscoe Arbuckle (Fatty), Minta Durfee (ragazza), Edgar Kennedy (Cyclone Flynn, il campione),Charles Chaplin (arbitro), Al St. John (boss), Hank Mann (uomo con la benda sull’occhio), Mack Swain (cowboy che scommette su Fatty), Mack Sennett, George “Slim” Summerville (spettatori), Billy Gilbert (cantante); Prod.: Keystone 35mm. L.: 597 m. Bn. D.: 32’ a 16 f/s.
In The Knockout, (…) Chaplin played a two-minute supporting role as referee to a boxing bout between Roscoe Arbuckle and Edgar Kennedy. It is a lively little performance that anticipates The Champion and City Lights. Chaplin’s refereeing is balletic, and introduces gags of a sophistication alien to the rest of the film. Worse hit than the pugilists, he lies down and drags himself around the ring by the ropes; then counts the loser out from a sitting position.
David Robinson, Chaplin, His Life and Art (Penguin, 2001)