Ringside footage shows the power of Brazilian YouTuber Whindersson Nunes Batistas's crushing body shot on Saturday night.
Whindersson came up against Polish rapper and MMA fighter Filipek as part of Kingpyn Boxing's influencer boxing tournament and won with the sore KO.
With just seconds left in the second round, Whindersson throws a brutal body shot and Filipek immediately drops to his knees.
The rapper can be seen holding his stomach in agony while down on the canvas, as the referee begins the count.
Filipek bravely made it back to his feet, but the referee did not think he would be able to continue and so waved off the bout.
Celebrations ensued for Whindersson, as the crowd went wild and he was lifted onto the shoulders of one of his team members.
In his post-fight interview, Whindersson was asked how he made it look so easy and he replied: "If you see something and think it's easy, it's because it was very hard when no-one was watching."
Prior to the fight Filipek had labelled Whindersson a clown, but after the victory, the Brazilian said: "I said the clown was going to get him, the clown got him."
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