Former lightweight champion Charles Oliveira submitted Mateusz Gamrot in front of his home fans in Brazil in the UFC Rio main event.

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.

Aswell (11-3 MMA, 1-1 UFC) made his promotional debut on just three days' notice earlier this year and dropped a decision to Bolaji Oki. But with a full fight camp for Lucas Almeida (15-5 MMA, 2-4 UFC), he came out blazing and never let up.

A lightweight showdown between Charles Oliveira and Mateusz Gamrot is set to headline UFC Fight Night on Oct. 11, 2025. The event will take place at Farmasi Arena in Rio de Janeiro, Brazil, with prelims beginning at 4 p.m. ET and the main card scheduled for 7 p.m. ET, both on ESPN+.

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.

The night had been going pretty damn well for the fans at Farmasi Arena in Rio de Janeiro. Brazilians won the night's first six fights. Michael Aswell spoiled that streak to end the prelims, and to open the main card, Ofli made it two straight.

Oliveira vs. Gamrot on 10/11/25. Alen's MMA DFS analysis to build winning daily fantasy UFC lineups. For the first time in 10 years, we have a UFC Fight Night in Rio, and I think it's safe to say that UFC has put out quite a solid card.

The UFC lightweight division has produced many electrifying fighters, but none have captivated audiences quite like UFC icon Charles Oliveira. While a

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.