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 .
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
Mateusz Masternak def. Jason Whateley (Unanimous Decision).
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
Whateley, who entered the ring undefeated, was knocked down in the seventh round .
Boks: Masternak Vs Whateley Guide
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 .
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 Boks: Masternak vs Whateley
Mateusz Masternak def. Jason Whateley (Unanimous Decision). The 12-round bout served as the main event
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 With this victory, Masternak (47-5, 31 KOs at
Whateley, who entered the ring undefeated, was knocked down in the seventh round .