Amanda Nunes KOs Cyborg in 51 seconds, Jones wins at UFC 232

Amanda Nunes knocked out Cris "Cyborg" Justino 51 seconds into the first round at UFC 232 on Saturday night, ending the featherweight champion's 13-year unbeaten run with one of the most surprising victories in mixed martial arts history.

Amanda Nunes KOs Cyborg in 51 seconds, Jones wins at UFC 232

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WATCH: Jones reclaims UFC title, Nunes KOs Cyborg in 51 seconds

UFC 232: Amanda Nunes KOs Cris 'Cyborg' Justino in stunning upset