Overview

• Charles Oliveira headlines UFC Rio on Oct. 11 at Farmasi Arena against replacement opponent Mateusz Gamrot after Rafael Fiziev withdrew with an injury.
• The bout marks Oliveira’s quick turnaround from a first-round knockout loss in June, with his camp shifting from a striker-specific plan to preparing for Gamrot’s wrestling-heavy style.
• Gamrot, a ranked lightweight who stepped in on short notice, has won four of his past five and most recently defeated Ludovit Klein by decision in May.
• Oliveira is publicly campaigning to face Conor McGregor on the proposed June 14, 2026 White House card for financial reasons, and McGregor’s 18‑month CSAD suspension makes him eligible to compete from March 20, 2026.
• He has floated a Max Holloway rematch as a potential farewell fight even as he downplays retirement talk, and UFC Rio is the promotion’s first Fight Night event in Rio de Janeiro in nearly a decade.