Fabio Wardley achieved a career-best win, stopping former world champion Joseph Parker in the eleventh round.
Wardley stunned Parker at the O2 Arena, where Parker had become the WBO interim champion in 2023 after defeating Zhilei Zhang.
Parker held the title until his loss to Wardley, with a record of 36-4 and 24 knockouts, while Wardley improved to 20-0-1 with 19 knockouts.
The drama was in evidence from the opening bell, as Wardley was hurt by a Parker right hand late on.
Author's summary: Fabio Wardley wins against Joseph Parker.