Oleksandr Usyk beat Dereck Chisora by unanimous decision after surviving an early onslaught at Wembley on Saturday night.
The former undisputed cruiserweight champion answered some of his critics at heavyweight as he overcame his first serious test in the division.
The fight began positively for Chisora as he came forward hurling big shots and gave Usyk plenty to think about.
There was a fair bit of holding and hitting from the Brit in the early stages as he successfully made the contest rough and tough for the Ukrainian.
Chisora’s wild hooks over the top occasionally landed and troubled Usyk, but by round three the former undisputed cruiserweight champion had started to find a consistent home for his own stinging southpaw left hand.
‘Del Boy’ caught Usyk’s attention with an overhand right at the start of the fourth but, as he predicted pre-fight, he was forced to eat a lot of leather in the following round.
By the halfway point, the Ukrainian looked to have adapted well to his opponent’s roughhousing and learned to counter it effectively.
In round seven, Usyk boxed literal rings around Chisora, circling the 36-year-old and landing at will.
At the end of the session Usyk put together a stunning combination which sent Chisora backwards into the ropes.
The bell rang at the perfect time for the staggered fighter.
Round eight was painfully one-sided as Usyk dominated a fatigued Chisora who looked to have run out of ideas.
He battled on valiantly through the ninth and tenth, forcing Usyk to work hard in search of his first notable heavyweight win.
But Usyk responded every time and answered every question.
In the final round, the Ukrainian saw home the victory and outclassed Chisora at range.
The judges’ scores declared a unanimous decision in favour of Usyk: 117-112, 115-113, 115-113.
“I think [it was] good, my boxing,” Usyk said post fight.
“It’s a real test in heavyweight. Big guy, hard guy. I fought his fight.
“My goal is not to be just world champion, undisputed world champion.”
Chisora then added: “I feel great, just disappointed. Yeah [I think I won].
“I gave a couple of rounds away but I was pushing the pace. The judges saw it a different way.”