Vasiliy Lomachenko has beaten Luke Campbell by unanimous decision.
The Ukranian secured victory on all three judges score cards (119-108, 119-108 and 118-109), adding the WBC lightweight belt to his existing WBA and WBO versions in the process.
Campbell was saved by the bell at the end of the fifth round, and was floored by Lomachenko in the 11th.
However, the English boxer rocked Lomachenko in the seventh; though the double Olympic gold medallist recovered and ended the round strongly.
Lomachenko (14-1) now holds three of the four lightweight belts, and claimed after his victory that his aim now is to become the division's undisputed champion.
The three-weight world champion sized Campbell up in the first few rounds, with the British boxer landed landing a good left hand in the first.
Lomachenko closed the distance in the second, but Campbell - who lost his only previous world title fight on a split decision to Jorge Linares - landed some solid body shots in return.
The Ukranian snapped Campbell's head back with a well-timed jab in the third, following it up with a firm body shot.
Lomachenko - clad in the blue and yellow of Ukraine - had further success with body shots late in the fourth, and almost won by stoppage in the fifth.
A big left hand sent Campbell staggering back towards the ropes, and the relentless Lomachenko unleashed a flurry of body shots as 'Cool Hand' was saved by the bell.
Campbell recovered well in the sixth, and almost stunned the boxing world in the seventh.
A huge right hand from the 31-year-old forced Lomachenko to hold on in an attempt to weather the storm, but crucially, the Ukranian recovered and ended the round with a big right hand of his own.
The fighters exchanged body shots in the eighth, and Campbell landed another excellent body shot in the ninth.
Hull native Campbell continued to enjoy moments of success, but Lomachenko's dazzling feet and fluid combinations ensured his superiority on the scorecards.
Lomachenko sent Campbell to the canvas with a trademark body shot in the 11th, but the Brit was able to climb back to his feet and see out the round.
The legendary amateur finished the final round strongly to secure a comfortable points victory, but this was an excellent performance from Campbell, who has certainly proved his credentials at world level.
Unfortunately for the 31-year-old, Vasiliy Lomachenko is on a different planet.
"Well he's just beat me, so he's very good!" Campbell said afterwards.
"Tonight was Lomachenko's night and my time will come."
On the undercard, Alexnder Povetkin secured a points win over Hughie Fury.
World champion Charlie Edwards' title defence against Julio Cesar Martinez ended in defeat, but the fight was later ruled a 'no contest' due to an illegal punch by Martinez.
Joshua Buatsi continued his impressive rise and extended his perfect record with a TKO victory over Ryan Ford, with the stoppage coming in the seventh round.
There were also wins for Joe Cordina and Savannah Marshall.