Oleksandr Usyk has overcome a stern challenge from Derek Chisora to claim a hard-fought unanimous decision win at Wembley Arena on Sunday (NZ time).
The result means Usyk, the former unified world cruiserweight champion, is now the mandatory challenger for Anthony Joshua's WBO belt.
"It's a real test in heavyweight, Chisora a big guy, a hard guy," says Usyk. "I was expecting a fight like that, I was expecting a tougher fight.
"My plan is to go to my home, maximum time with my family. I want to become not just world champion, but the undisputed world champion."
Chisora dominated the opening rounds and roughhouse tactics seemed to rattle Usyk, but the Ukraninan held firm and fought his way back into the contest.
A vicious assault from Usyk almost ended Chisora's resistance in the seventh round, but the Brit was saved by the bell.
Chisora enjoyed a brief recovery before Usyk made sure of victory by controlling the latter rounds to secure his 18th professional victory, which the judges scored 117-112 and 115-113 twice.
Usyk only gave himself "three out of 10" for the display.
Chisora meanwhile said he was disapointed with the result.
"I feel great. I was pushing the pace," he says. "I'm just disappointed with the result, gutted.
"I gave a few rounds away but I was pushing the pace. But the judges saw it a different way."