XTB KSW 107 takes place on June 14, 2025, at Ergo Arena in Gdańsk/Sopot. Phil De Fries faces undefeated Arkadiusz Wrzosek for the KSW Heavyweight title. De Fries, a 38-year-old grappling veteran, clashes with the 32-year-old kickboxing star Wrzosek in a high-stakes main event.