In a major UFC shakeup, Charles Oliveira has been handed a dangerous dark horse opponent for UFC Rio in October. Rafael Fiziev has withdrawn, and No. 7-ranked lightweight Mateusz Gamrot steps in.
UFC officially announced the news on Tuesday. Their lightweight main event concludes on October 11, where Oliveira will put his No. 3 lightweight ranking on the line, while Gamrot arguably fights for title contention.
“Mateusz Gamrot, that’s the guy we’re going to war with,” Oliveira announced in a video posted to UFC Brasil. “The rest [of the fighters] just wanted hype, they just wanted to talk nonsense.”
NEW MAIN EVENT ALERT 🚨@CharlesDoBronxs will now face @Gamer_MMA at #UFCRio on October 11! 🇧🇷 pic.twitter.com/q9fxMkg50M
— UFC (@ufc) September 23, 2025
Gamrot had called out ‘Do Bronx’ for a short-notice opportunity, and was ecstatic to find he’d be stepping up in three weeks’ time.
He could barely contain his excitement in a video posted on Tuesday night.
Mateusz Gamrot was HYPED after finding out he’ll be fighting Charles Oliveira at #UFCRio in 3 weeks 😂
🎥 @Zabooor
— Championship Rounds (@ChampRDS) September 23, 2025
Oliveira’s homecoming event will continue with 13 fights, subject to change.
Main eventMain cardPrelims
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