Mateusz Masternak defeated Jason Whateley via on October 29, 2022, in their IBF cruiserweight world title eliminator . The 12-round bout served as the main event of Knockout Boxing Night 25 held at the Nosalowy Dwór Resort & Spa in Zakopane, Poland. Fight Highlights
Masternak has since competed in several high-profile matches, most recently losing a unanimous decision to on April 4, 2026, for the European title. Historical records and upcoming schedules for Masternak can be tracked through the BoxRec Fighter Page . Boks: Masternak vs Whateley
Whateley, who entered the ring undefeated, was knocked down in the seventh round . Mateusz Masternak defeated Jason Whateley via on October
With this victory, Masternak (47-5, 31 KOs at the time) became the mandatory challenger for the IBF cruiserweight world title, then held by Jai Opetaia . Event Summary Date October 29, 2022 Location Zakopane, Poland Weight Class Cruiserweight (200 lbs) Referee Leszek Jankowiak Card Billing Main Event Historical records and upcoming schedules for Masternak can