Following the withdrawal of Rafael Fiziev, Charles Oliveira officially has a new opponent for the UFC Fight Night: Rio de Janeiro card set for Oct. 11.

While plenty of fighters from Diego Lopes to Joaquim Silva offered to step in, according to a post shared to Oliveira's Instagram story on Tuesday, he'll be fighting Mateusz Gamrot in the main event of the highly-anticipated card.

"Hey my family, just dropping by to let you know that my new fight is out now. First of all, I'd like to thank everyone for all the messages, for all the tremendous affection. That's why I want to be a part of UFC Rio de Janeiro on October 11th.

"Opponent: Mateusz Gamrot. This is the guy we're going to battle in a great war. The rest just wanted the hype, just wanted to stall and talk, but that's part of it.

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