Costa: "It's because of me that Chimaev didn't make weight"
“I stole his cap, his sleep, his weigh-in, and his main fight. I stole everything from him and I have to fight this guy! Hey Chimaev, you have to do something about this. I stole everything from you, made you nervous. Of course, it was because of me that he didn't make weight."
Chimaev failed the weigh-in and his fight with Nate Diaz was cancelled. On the eve of the tournament, Costa and Khamzat had a skirmish in the UFC PI hall.