Anthony Joshua needed just two rounds to see off former UFC champion Francis Ngannou in their much-hyped heavyweight showdown in Riyadh, Saudi Arabia.
Ngannou took part in just his second boxing match after an impressive display in his debut against Tyson Fury.
However, the power of Joshua proved too much, with the Brit proving his title credentials once more.
Ngannou stunned the world when he floored Fury in November before losing a controversial split decision and was looking for similar against former two-time world champion Joshua.
The Cameroonian started well and threatened with the left hook before partially landing a looping right, but he was stunned by a straight right from Joshua that sent him to the canvas in a dramatic opening round.
Both men came out swinging in the second.
Joshua ducked under a jab to find a home for another strong right before the same shot floored Ngannou for the second time.
The former UFC champion returned to his feet and carried on, but Joshua ended the contest in incredible fashion, marching forward and unleashing a right hand that knocked Ngannou out cold.
It was a fourth successive win for AJ following back-to-back losses and set up a potential future showdown with the winner of May’s unification bout between Oleksandr Usyk and Fury.