In his first UFC main event, Melquizael Costa fights Arnold Allen in a bout that could reshape the featherweight division.
This is more than a headline slot. For Melquizael Costa, UFC Vegas 117 marks a turning point. Facing top-ranked Arnold Allen, the Brazilian steps into a high-stakes moment that could redefine his place among the featherweight elite.
Costa’s rise has been rapid and hard to ignore. He went undefeated in 2025 with five wins in five fights, then carried that momentum into this year with a knockout victory over Dan Ige. The result pushed him firmly into contender territory.
Allen, however, represents a different level of challenge. Known for his precision and consistency, the English fighter has long been a fixture near the top of the division. This matchup tests not only Costa’s skillset, but his readiness for elite competition.
Strong Brazilian presence
Brazil’s impact extends far beyond the main event. Seven fighters from the country are scheduled to compete, reinforcing its ongoing influence inside the Octagon.
On the main card, Daniel Santos faces Dooho Choi, while Rodolfo Bellato meets Modestas Bukauskas in a light heavyweight clash.
In the women’s bantamweight division, Ketlen Vieira takes on Jacqueline Cavalcanti in an all-Brazilian showdown. Vieira aims to climb back toward title contention, while Cavalcanti looks to continue her upward trajectory.
Polyana Viana and Nicolle Caliari also enter the cage with something to prove, each seeking to carve out space in competitive divisions.
A night of consequences
UFC Vegas 117 carries more than entertainment value. It’s a proving ground. For some fighters, it’s about survival. For others, it’s a launchpad. For Costa, it may be the moment that separates prospect from true contender.
The event streams live on Paramount+, beginning in the early evening and building toward a main event with real implications for the division’s future.
Event Info
- Event: UFC Vegas 117: Allen vs Costa
- Date: Saturday, May 16, 2026
- Location: Meta Apex, Las Vegas, United States
- Pre-show: 5 PM (Brasília time)
- Preliminary card: 6 PM (Brasília time)
- Main card: 9 PM (Brasília time)
