HBO expert analyst Max Kellerman was blown away by the explosive ending on Saturday night in Atlantic City.

In a stunning turn of events, Eleider Alvarez scored a spectacular seventh round knockout of Sergey Kovalev to capture the WBO light heavyweight title at the Hard Rock Hotel & Casino in Las Vegas.

The fight was completely turned around in the seventh, when Alvarez landed a perfect right hand that sent Kovalev down for the first time. He never full recovered.

There were some observers who picked Alvarez to win by decision, but very few saw him winning by knockout. It was only Alvarez's 12th knockout in his 24 fight unbeaten streak.

"Larry Merchant called this the theater of the unexpected. You could see Alvarez outboxing Kovalev, you could see Kovalev knocking out Alvarez, and even if you could see an Alvarez potential stoppage - you would think it would be more of the kind where he surprised Kovalev, he started to wear him down, he reminded Kovalev of Andre Ward and Kovalev had some give in him somehow. That's not what I saw," Kellerman said.

"I saw Kovalev weather the early surprise of Alvarez's speed and boxing ability, hit Alvarez with everything but the kitchen sink in that fourth round. Alvarez weathered the storm, yet Kovalev maintained the initiative, Kovalev started to take over the fight and then when you least expect it - Alvarez stopped Kovalev, basically with one punch. That right hand ended the fight. Yes Alvarez followed up smartly and intensely, and that ultimately ended the fight. But the beginning of the end was that one right hand. A one punch-ish kind of knockout from a guy who can't punch.

"That's not Kovlav having his body broken or being convinced that he's not good enough on this night - ghosts of Andre Ward - that's Kovalev getting the decision to continue taken out of his hands, by Alvarez disconnecting Kovalev's head from his own legs. In other words, that's Kovalev telling his legs to get up, be steady, and his legs are saying ' I can't do it.'"