But there was certainly nothing controversial about the manner of that victory.
The crowd erupted as the then-undefeated former world champion floored his mandatory challenger in just the third minute of the first round.
Wilder improved his record at the time to 41-0-1 with 40 career knockouts while Breazeale dropped to 20-2 overall.
Twitter user b0xingfan shared a video of the devastating moment Wilder delivered a huge one-punch knockout to defeat Breazeale.
WATCH: Deontay Wilder brutally knocked out Dominic Breazeale to retain his WBC heavyweight title three years ago this week
Check out the video below…
Breazeale can be seen standing still for a split second as his mind took a moment to register what had just hit him before his body crashed to the ground like a sack of potatoes.
The video was captioned: “In 2019, Deontay Wilder defeated Dominic Breazeale by KO in round 1 of 12 to retain the WBC heavyweight title.”
Speaking after the fight, Wilder said: “Everything just came out of me tonight.
“I know it’s been a big build up. 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.
“I just told Breazeale I love him and of course I want to see him go home to his family. I know we say some things, but when you can fight a man and then you can hug him and kiss him, I wish the world was like that. We shake hands and we live to see another day and that’s what it’s all about.
“I understand what Tyson Fury did. When you get dropped on the canvas like that I understand you have to get yourself back together.
“But the rematch will happen, like all these other fights will happen. The great thing is all these fights are in discussion. The big fights will happen. I just want you to have patience.
“You know what the saying is, good things come to those who wait.”