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 Rafael Fiziev has withdrawn, and No. 7-ranked lightweight Mateusz Gamrot steps in.<\/p>\n
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.<\/p>\n
“Mateusz Gamrot, that’s the guy we’re going to war with,” Oliveira announced in a video posted to UFC Brasil<\/a>. “The rest [of the fighters] just wanted hype, they just wanted to talk nonsense.”<\/p>\n NEW MAIN EVENT ALERT \ud83d\udea8@CharlesDoBronxs<\/a> will now face @Gamer_MMA<\/a> at #UFCRio<\/a> on October 11! \ud83c\udde7\ud83c\uddf7 pic.twitter.com\/q9fxMkg50M<\/a><\/p>\n \u2014 UFC (@ufc) September 23, 2025<\/a><\/p>\n Gamrot had called out ‘Do Bronx’ for a short-notice opportunity<\/a>, and was ecstatic to find he’d be stepping up in three weeks’ time.<\/p>\n He could barely contain his excitement in a video posted on Tuesday night.<\/p>\n Mateusz Gamrot was HYPED after finding out he\u2019ll be fighting Charles Oliveira at #UFCRio<\/a> in 3 weeks \ud83d\ude02<\/p>\n \ud83c\udfa5 @Zabooor<\/a> <\/p>\n pic.twitter.com\/fkQbTcVW1h<\/a><\/p>\n \u2014 Championship Rounds (@ChampRDS) September 23, 2025<\/a><\/p>\n Oliveira’s homecoming event will continue with 13 fights, subject to change.<\/p>\n Main eventMain cardPrelims<\/p>\n Stick with\u00a0MMAKnockout<\/a>\u00a0for more\u00a0FREE coverage\u00a0of the UFC, MMA, Boxing. Follow MMAKnockout on\u00a0Facebook<\/a>,\u00a0Twitter<\/a>, and\u00a0Instagram<\/a>.<\/p>\n