Watch: Yadong annihilates Perez with huge right hand

Song Yadong scored a vicious highlight-reel knockout Saturday, using a huge right hand to drop Alejandro Perez in the first round of their UFC 239 fight.

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Yadong - who at 21 years old is the second-youngest fighter in the UFC - has now won all four of his fights with the promotion since making his debut in 2017. His knockout of Perez was his third stoppage within the first two rounds.