Anthony Joshua survived a huge knockdown to recover and seal a sensational 11th-round stoppage win against Wladimir Klitschko at Wembley Stadium.
Joshua had the better of the first round without really troubling Klitschko, who was trying to line up his ramrod jab.
Klitschko landed an overhand right at the start of the second, but that proved to be the best shot of a cagey round. The Ukrainian then looked to hold and spoil in the third as Joshua looked to take more of the initiative, without being able to land anything of note.
Joshua was on the front foot in the fourth as he enjoyed the better of the round, landing some decent shots on Klitschko, who took them well.
An unbelievable fifth round saw Klitschko floored by a series of huge shots, but get up to rally and have Joshua in huge trouble and wobbling back to his corner at the end of the pulsating three minutes.
Yet more drama was to follow in the sixth as Klitschko landed a shuddering straight right that polaxed Joshua, who just about made it to his feet to see out the round.
Both seemed happy to take a breather in the seventh as neither really went hunting for the stoppage.
Joshua seemed to have recovered by the start of the eighth and looked to get back in command, Klitschko ending the round behind his steely jab.
The Londoner got back on the front foot, dishing out several left hooks and a straight right, which Klitschko took well.
Joshua edged an enthralling 10th round, but had to ship a Klitschko right hand at the death.
Another thrilling round followed in the 11th as Joshua stalked Klitschko, who had used his experienced legs throughout the fight.
Joshua landed a huge right uppercut that wobbled Klitschko and he pounced on the 41-year-old, flooring him for the second time in the contest.
Klitschko gamely got back to his feet, but Joshua scented blood and set about the Ukrainian, sticking him back on the canvas again.
Although he beat the count again, referee David Fields had no choice but to step in and save Klitschko from more punishment, handing Joshua the spectacular win and the WBA super championship to his IBF strap.