Oliveira–Tsarukyan Rematch Reported as Five‑Round, Non‑Title Main Event for UFC 331

The reported five‑round allocation raises the winner's path to the lightweight title without putting Charles Oliveira's ceremonial BMF strap on the line.

Overview

Multiple outlets report that Charles Oliveira and Arman Tsarukyan are scheduled to headline UFC 331 at Crypto.com Arena in Los Angeles on September 19, 2026, but the matchup has not been officially announced by the UFC.
Brazilian reporter Leo Guimaraes is the primary source saying the bout will be a full five rounds and that the BMF belt will not be defended in the rematch.
Guimaraes also reported that the UFC initially planned a three‑round fight and later upgraded it to a 25‑minute feature, a change that fighters had to adjust for in camp.
Tsarukyan won a razor‑thin split decision over Oliveira at UFC 300 and has since stayed active with grappling and a November submission of Dan Hooker, though a prior UFC 311 withdrawal delayed his title candidacy.
The same reporting says Joshua Van vs. Alexandre Pantoja is confirmed for UFC 331 and that a planned Kayla Harrison–Amanda Nunes bout has been postponed, and the BMF strap is a ceremonial fan title rather than an official divisional championship.