Whateley, who entered the ring undefeated, was knocked down in the seventh round .
Mateusz Masternak def. Jason Whateley (Unanimous Decision). Boks: Masternak vs Whateley
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 . Whateley, who entered the ring undefeated, was knocked
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 who entered the ring undefeated