UFC Fight Night 261 is set to take place on October 11, 2025, at the Farmasi Arena in Rio de Janeiro, Brazil. The event marks the UFC’s return to Rio for a Fight Night card, nearly a decade after its last one in the city. Fans can expect the prelims to begin at 4:00 p.m. ET, followed by the main card at 7:00 p.m. ET, streaming live on ESPN+. The Brazilian crowd is expected to create a loud, electric atmosphere in support of Charles Oliveira, one of Rio’s favorite fighters.
The main event originally featured Charles Oliveira against Rafael Fiziev, but Fiziev was forced to withdraw due to a knee injury sustained in training. In response, Mateusz Gamrot stepped in on short notice to replace him, adding a new dynamic to the fight. On the undercard, Santiago Ponzinibbio also pulled out due to injury, with Joel Álvarez stepping in to face Vicente Luque. Additionally, Saimon Oliveira missed weight by eight pounds for his bantamweight bout against Luan Lacerda, resulting in the fight proceeding at catchweight with a financial penalty.
Charles Oliveira’s camp made strategic adjustments after the change of opponent. Instead of preparing for Fiziev’s striking-heavy style, they refocused on countering Gamrot’s grappling and wrestling approach. Oliveira, a Brazilian jiu-jitsu specialist, is expected to capitalize on scrambles and submission opportunities, particularly if the fight hits the mat. Gamrot’s team, meanwhile, is preparing to neutralize Oliveira’s ground game by maintaining top control, using clinch work, and mixing takedowns with striking combinations. Both sides understand the tactical stakes: Oliveira seeks to reassert dominance on home soil, while Gamrot aims to outwork the former champion through pace and positional control.
In the build-up to fight week, media attention has centered on Oliveira’s comeback following his loss to Ilia Topuria and the risks of taking another high-level fight so soon. The Brazilian is viewed by many as a dangerous but unpredictable force—capable of brilliance or vulnerability within the same round. Gamrot, stepping in as a late replacement, is being described as the dark horse of the lightweight division, with pundits praising his willingness to take on a top contender in hostile territory. Most previews frame this fight as a classic clash of styles: Oliveira’s fluid jiu-jitsu against Gamrot’s relentless wrestling pressure.
Analysts in the pre-fight studio have highlighted the grappling exchanges as the key battleground. Many believe that if Gamrot can avoid Oliveira’s submission traps and secure top position early, he could control the tempo of the fight. Others argue that Oliveira’s creativity and finishing instincts make him dangerous from any position. Discussion has also focused on conditioning—whether Gamrot’s shorter training camp will impact his stamina—and the energy of the Rio crowd possibly giving Oliveira an emotional boost. Overall, the consensus among analysts is that this matchup could be one of the most technically intriguing lightweight bouts of the year.
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