In a 5-round lightweight bout in the main event, Charles Oliveira and Mateusz Gamrot meet Saturday at UFC Fight Night 261 in Rio de Janeiro.

Welcome home, Charles Oliveira. "Do Bronx" received a hero's reception in Rio de Janeiro on Saturday, rewarding their hospitality with a submission win over Mateusz Gamrot in their UFC Fight Night headliner.

UFC Rio will take place at the Farmasi Arena in Rio de Janeiro, Brazil, on Oct. 11. The preliminary card starts at 4 p.m. ET / 1 p.m. PT, while the main card begins at 7 p.m. ET / 4 p.m. PT.

Fans raise concerns about UFC Rio suffering another setback just hours out from Fight Night. Saturday night’s event has already gone through some substantial changes ahead of October 11, with Charles Oliveira facing replacement opponent Mateusz Gamrot in the main event.

Arguably the best card top to bottom in the UFC this year… Welcome to UFC 320. Barring any pullouts or weight-cut misses, we have 14 fights on deck this weekend, with all of the prelims on ESPN+ beginning at 6 p.m. ET. Just five of the 14 fights are expected to end inside the distance for this card.

There could be a new UFC light heavyweight contender after Saturday. Carlos Ulberg vs. Dominick Reyes headlines UFC Fight Night in Perth, Australia, one week before 205-pound champion Magomed Ankalaev fights Alex Pereira at UFC 320.