One of the many side stories for UFC 279 was the brief confrontation between Khamzat Chimaev and Paulo Costa. The two got heated during a fight week encounter at the UFC Performance Institute and had to be separated, but the incident was caught on camera and has since gone viral.

Yesterday morning Khamzat announced via social media that he will be fighting at 185 pounds from now on in the middleweight division.

Hours later, Paulo Costa took to social media to make the announcement that he and Khamzat have signed contracts to face each other in December.

A shirtless “Borrachinha” made a special appearance on the MMA Hour on Monday where he continued to take shots at Chimaev. This time, he says he was the reason why the undefeated contender missed weight for his supposed headliner with Nate Diaz.

“I stole some of his hype. I stole his night’s sleep. I stole his cap. I stole his main event fight. I stole everything.”

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Costa went on to shoot his shot for a possible fight against “Borz.”

“Chimaev, you need to do something, motherf—r. I stole everything that you had. Everything that you had. Your hat, I stole your night’s sleep. I stole your weigh-in. I stole everything.

You are disturbed, so crazy. ‘Oh, I cannot do this, I will die.’ So, I think I need to fight that guy.

“For sure (I’m the reason he missed weight). He become so angry, so stressed. And he almost give up… he give up. He missed weight (by) eight pounds, almost nine. He gave up, for sure.”

Chimaev (12-0) ended up fighting Kevin Holland at a 180-pound catchweight at the co-main event and won via first-round submission. As for Costa (14-2), he last saw action at UFC 278 against Luke Rockhold in August and won via unanimous decision.

There was some theatre down at the UFC Performance Institute yesterday involving one of the men scheduled to appear in the main event of this weekend’s UFC 279.

Cameras captured the moment Khamzat Chimaev got into it with, and needed to be separated from, Paulo Costa.

Videos of the altercation have been circulating online ever since. You can see one angle of it below, thanks to TheMacLife.

The videos show Chimaev and Costa hurling insults while Chimaev, who appears to be mid-sauna session, is held back by a bunch of his pals.

Former UFC title challenger Jake Shields, who is more known for his social media musing as of late, was there on the scene. He told MMA Junkie what went down.

“I was there this morning working out with Paulo Costa, going over some techniques and just drilling, and all of a sudden Khamzat starts yelling at us and cussing Paulo like, ‘Well, you want to fight?’” he said. “We look over, and it’s him and like 10 dudes.