The Twilight Zone, Season 5

Rod Serling:
Sports item, circa 1974: Battling Maxo, B2, heavyweight, accompanied by his manager and handler, arrives in Maynard, Kansas, for a scheduled six-round bout. Battling Maxo is a robot, or, to be exact, an android, definition: 'an automaton resembling a human being.' Only these automatons have been permitted in the ring since prizefighting was legally abolished in 1968. This is the story of that scheduled six-round bout, more specifically the story of two men shortly to face that remorseless truth: that no law can be passed which will abolish cruelty or desperate need - nor, for that matter, blind animal courage. Location for the facing of said truth: a small, smoke-filled arena just this side of the Twilight Zone.