Korreshkov vs Tibau, Romanov vs Muniz set for Fight Nights June 6

Fight Nights Global president Kamil Gadzhiev has confirmed two welterweight Grand Prix bouts for Fight Nights 138, scheduled for June 6, 2026, in Saint Petersburg. Andrey Korreshkov will meet Gleison Tibau, and Sergey Romanov will square off with Andre Muniz, with both fights forming part of the organization's ongoing welterweight tournament.

Gleison Tibau brings a wealth of experience to the contest against Korreshkov. The 42-year-old Brazilian, who trains out of American Top Team, carries a professional record of 33 wins and 14 losses. Fighting out of a southpaw stance at five-foot-ten with a 71-inch reach, Tibau has long been regarded as a dangerous grappler, averaging over four takedowns per 15 minutes across his career.

Andre Muniz, nicknamed Sergipano, enters his bout with Romanov as one of the more well-rounded competitors in the tournament. The 36-year-old Brazilian holds a record of 24-8 and stands six-foot-one with a 78-inch reach. Fighting southpaw out of Tata Fight Team Montes Claros, Muniz combines a sharp submission game — averaging 1.1 attempts per 15 minutes — with credible striking, landing at a 48 percent accuracy rate and posting 2.08 significant strikes per minute.

Why it matters

• Both bouts are official Grand Prix tournament matchups, meaning wins carry direct bracket implications for the welterweight title picture at Fight Nights Global.
• Tibau's elite takedown volume sets up a compelling stylistic test for Korreshkov, who has been active in the Russian regional scene.
• Muniz's combination of grappling and above-average striking accuracy makes him a multi-dimensional threat for Romanov to solve.
• The June 6 card in Saint Petersburg shapes up as a significant night for the welterweight division within the promotion.