T-Mobile Arena, Las Vegas - Heavyweight contender Zhang Zhilei (24-0-1, 19 KOs) crushed Scott Alexander (16-5-2, 8 KOs) in one round, with a one-punch knockout. (photos by Ed Mulholland)

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Alexander was a late replacement for Filip Hrgovic, who withdrew due to his father's recent passing.

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Alexander was jabbing to the gut for most of the round and circling around the ring. But then out of nowhere, Zhilei landed a big shot right down the pipe, which cracked the chin of Aleander and sent him down hard on his back.

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The referee quickly waved off the fight as Alexander was not capable of getting up.

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