A teenage soccer player in Brazil was DECKED by a flying karate kick during an insane brawl in a championship game … and the dude came away from the scrap with a gnarly wound.

The wild scene all went down Monday in Curitiba, Brazil, where Fluminense and Athletico Paranaense were duking it out for the U-17 Brasileirão title.

In the 93rd minute of a tight game … Fluminense’s João Neto was charging for a ball looking to add on to his team’s scoring sheet.

The problem? He was tackled around midfield and was so pissed about it, he came up shoving.

That ignited a huge melee … and when an Athletico Paranaense player tried to defend his teammates, he came in with an MMA style dropkick that connected squarely with Neto’s face.

Check out a tighter angle of the violent kick … it landed flush, and Neto dropped like a bag of sand.

More pushing, shoving and kicking went down between the two teams … until, finally, the players were all able to separate themselves from the fracas.

In total, NINE players (including Neto) were reportedly sent off for their roles in the brawl … and Neto showed off his cleat wound in the locker room a short time later.

Yeah. Ouch.

Fortunately for Neto, his squad got the last laugh … Fluminense was able to hold off Athletico Paranaense to raise the trophy at the end of the game.