FIGHT fans were left stunned by a brutal knockout on the undercard of Jake Paul's win over Andre August.
Paul, 26, stopped fellow American August, 35, in the first round of their bout in Orlando on Friday.
But it was earlier in the evening that the most conclusive KO of the night came about.
It was in a clash between Cubans Yoenis Tellez and Livan Navarro.
The pair looked set to go to the judges scorecards as they entered the final three minutes of their 10-round fight.
But Tellez, 23, then pulled out the perfect left hook as he sent Navarro down onto the canvas.
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The referee immediately waved off the contest as Navarro was left in a bad way from the concussive shot.
Meanwhile, Tellez climbed up onto the ropes to celebrate in front of shocked boxing fans.
And those on social media were left equally as stunned by the vicious ending after DAZN shared the clip alongside the caption: "Shut him down like a Macbook 💻."
One said: "As soon as I saw it I thought 'S**t, that has to get KO of the year'."
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Another added: "What a knockout 🔥."
A third replied: "Damn, that was nasty 😳."
While a fourth responded: "Absolute peach of a shot ��."
Super-welterweight Tellez moves to 7-0 in his professional career, with six knockouts.
Navarro now has two losses on his record from 17 fights.