Andrey Koreshkov vs Gleison Tibau and Sergey Romanov vs Andre Muniz set for June 6

BetCity Fight Nights 138 will host two welterweight Grand Prix bouts in Saint Petersburg on June 6, 2026, after promotion head Kamil Gadzhiev announced the matchups. Andrey Koreshkov will face Gleison Tibau, and Sergey Romanov will meet Andre Muniz, with both contests forming part of the organization's ongoing welterweight tournament.

Koreshkov, known as "Spartan," carries an impressive 19-2-0 record into the fight at 35 years old. Standing six feet tall, he is one of the more active strikers in the division, landing 2.84 significant strikes per minute at 39 percent accuracy, and he backs that up with a strong grappling game averaging 4.8 takedowns per 15 minutes.

His opponent Tibau is a 42-year-old Brazilian veteran from American Top Team who holds a 33-14-0 record. Standing five feet ten inches with a 71-inch reach, the southpaw has built his career on wrestling, averaging 4.08 takedowns per 15 minutes, though his striking output sits at 1.95 significant strikes per minute on 31 percent accuracy.

In the second Grand Prix contest, Romanov faces Andre Muniz, the 36-year-old Brazilian nicknamed "Sergipano" who trains out of Tata Fight Team Montes Claros. Muniz holds a 24-8-0 record and presents a well-rounded threat at six feet one inch with a 78-inch reach. A fellow southpaw, he lands 2.08 significant strikes per minute at a sharp 48 percent accuracy and adds consistent grappling pressure with 3.98 takedowns and 1.1 submission attempts per 15 minutes.

Why it matters

• Both bouts are official Grand Prix tournament fights, meaning each result will carry direct implications for the welterweight bracket.
• Koreshkov versus Tibau pits a high-volume takedown fighter against a striker who also excels at putting opponents on the mat.
• Muniz brings elite submission volume and striking accuracy, setting up a technically demanding clash for Romanov.