When Wladimir Klitschko predicted he would win Anthony Joshua in their Wembley epic fight, he was ready to sell the memory stick with the prediction video for a reasonable amount, but Joshua, the England-born son of Nigerian parents, stopped that dream with a deadly uppercut.

At the 11th round of the fight, Joshua produced the performance of his career to add the WBA world heavyweight title to his IBF crown with an enthralling knockout win over Wladimir Klitschko at Wembley Stadium.

A post-war record 90,000 fans at the national stadium were treated to a see-saw contest, Joshua dropping the former unified world champion in the fifth round, before being put down - for the first time in his 19-fight career - in the sixth.

Both men looked in danger of being stopped over two rounds which will live long in the memory, before Joshua delivered the clinical blows in the 11th.

Joshua landed what the BBC described as a brutal uppercut which gave him the platform to send Klitschko down with an immediate flurry.

'Dr Steelhammer' stood, was dropped by a left hook again moments later, and then stood again, only for referee David Fields to save the challenger when pinned against the ropes.

Joshua threw his arms into the air as roars rolled down the Wembley tiers. He had come through his stiffest test to date, while Klitschko had answered questions of his own, showing he remains competitive at world level, even at 41.

Anthony Joshua Wladimir Klitschko

He will rue not finishing the job when he floored Joshua and appeared tantalisingly close to reclaiming two of the titles he lost in his last fight against Tyson Fury in 2015.

"What can I say? 19-0, three and a half years in the game," said Joshua. "I'm not perfect but I'm trying, and if you don't take part, you're going to fail.

"As boxing states, you leave your ego at the door and you respect your opponent. So a massive shout-out to Wladimir Klitschko."

Before the fight, Joshua had pointed out that it took "two to tango". 

Klitschko had turned into fortune-teller ahead of the hugely anticipated world heavyweight title bout.

He had recorded a video of himself predicting the outcome of the fight and put it on a memory stick which will be sealed into the robe he wears to the ring to face Joshua.

Anthony Joshua Wladimir Klitschko

After the fight, Klitschko will auction off the robe -- along with his pre-fight prediction on the memory stick -- for his charity, the Klitschko Foundation.

"I see myself in AJ (Joshua), I know how he thinks, what he's going to do and how the fight is going to be. I'm not Nostradamus, but I feel so strong in my obsession," the 41-year-old Klitschko said.

"Obsession is love in extreme shape so I'm in love with my goal. My goal, my obsession and love, is that those belts will come back to my corner," the Ukrainian added.

It is not clear if the robe would be bought, but one thing is for sure, Klitschko's prediction did not come true. He had been floored by the British citizen born to Nigerian parents.