AJ was unable to cope with Usyk’s sharp speed and movement and the former cruiserweight made it very difficult for the Brit to land his killer right hand.
He came into the contest as the much bigger man, carrying an advantage of more than a stone in weight and three inches in height, but unfortunately for Joshua, he was unable to use it to his advantage.
The win was massive for Usyk, who extended his unbeaten record to 19-0.
Joshua’s defeat now puts a blockbuster fight with Tyson Fury, who defeated Deontay Wilder earlier this month, on the backburner.