LONDON, England - So well drilled was the punch that stopped Daniel Dubois on Saturday night at Wembley Stadium, that Oleksandr Usyk had actually named it seven years ago during a training camp in America.

The particular left hook, thrown wide and hard, might not be the type drilled in amateur boxing clubs up and down the Ukraine this week but it is certainly effective. Just ask Dubois.

For Usyk and his team, it's simple. When you put your head down and swing for the hills with a shot like that it's known as 'The Ivan' and Usyk always has it in his locker for whenever he needs it.

As the fifth round at Wembley Stadium approached its final minute, Usyk dropped Dubois for the first time. When the Londoner got to his feet, he knew he had to fight to survive but Usyk was in no mood to get caught.

Instead, when Dubois missed with a right hand, Usyk dropped his head, closed his eyes and sent a huge Ivan left hook directly into Dubois' chin, dropping him instantly and ultimately securing the undisputed heavyweight crown.

The Ring asked Usyk why he and his team called it Ivan, was it named after anybody in particular, but he said it was chosen to reflect the sort of punch thrown by a typical Ukrainian hard man.

"It's a punch named Ivan," he explained. "There's a normal left hook and then there is one thrown like that - we call it Ivan.

"It's a Ukrainian man. He’s a big guy who lives in a village, works in a farm. People would ask him, what is your name and he says 'my name is Ivan!' It's a hard punch."

Having stopped Dubois in nine in their initial fight in Poland two years ago, Usyk made even quicker work of his rejuvenated opponent at Wembley.

He looked like a man who had already worked Dubois out and simply had to pick up where he had left off in Wroclaw.

"We prepared well for this fight with my team," he added. "We learned a lot from the first fight, we had a long time to prepare for this - two years. We prepared that specific combination.

"We came up with this punch and named it back in 2018 in America when I was cruiserweight."