Undefeated Deontay Wilder brutally knocked out Dominic Breazeale in the first round of their grudge match on Saturday night to retain his World Boxing Council heavyweight world title.

Wilder, who has one of the most destructive right hands in heavyweight history, floored the challenger with a one-punch knockout with 43 seconds left in the opening round at Barclays Center arena.

“Everything just came out of me tonight,” Wilder said. “I know it’s been a big buildup. There’s been a lot of animosity and a lot of words that were said, and it just came out of me tonight. That’s what makes boxing so great.”

“When I hit him with the right hand the first time his body language changed,” said Wilder. “When you been in there with so many different guys you learn to recognize body language. I knew he was slowing down and opening up.”

Let’s slow that down a touch.

Wilder improved to 41-0-1 with 40 KOs in making the ninth defense of his title against heavy underdog Breazeale.

Wilder, who won the bronze medal for the US at the 2008 Olympic Games, moved up the all-time heavyweight defense list and joined four iconic champions who also made nine straight defences: Muhammad Ali, Joe Frazier, Mike Tyson and Lennox Lewis.

Great company.

The all-time record for any division is 25 by Joe Louis.

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