It all goes down tomorrow night (Sat., Oct. 11, 2025) at UFC Rio LIVE on ESPN+ from inside Farmasi Arena in Rio de Janeiro, Brazil, as former UFC Lightweight king Charles Oliveira returns to action opposite short-notice replacement Mateusz Gamrot.

The UFC returns today, Oct. 11, to one of the world’s hotbeds of MMA as they host an event in Rio de Janeiro, Brazil, for UFC Fight Night 261: Oliveira vs. Gamrot.