Igor Severino VS Zhalgas Zhumagulov

Igor Severino's OKTAGON bantamweight title defense against Zhalgas Zhumagulov was ruled a No Contest after an illegal low blow stopped the action at 2:18 of round 5. Zhumagulov, the reigning OKTAGON flyweight champion, had moved up a division to challenge for a second simultaneous title in what was billed as a champion-versus-champion main event. The bantamweight championship remains with Severino, but the fight does not count as an official title defense under the No Contest ruling. Both fighters had previously been released by the UFC before ascending to championship level in OKTAGON — Severino following a 2024 biting incident, Zhumagulov after a series of disputed decisions that ended his UFC tenure.

OKTAGON 89 crowns its main event with a rare champion-versus-champion showdown as bantamweight king Igor Severino, a 22-year-old Brazilian finisher unbeaten inside the promotion, makes his first title defense against flyweight champion Zhalgas Zhumagulov, a seasoned UFC veteran chasing history as OKTAGON's first simultaneous two-division champion. Zhumagulov's late-fight durability and championship pedigree collide with Severino's explosive finishing power in a clash that will define the promotion's pound-for-pound landscape.