A massive shocker on Saturday night at Matchroom's Fight Camp in Brentwood, as Dillian Whyte's hopes of landing a mandatory shot at the WBC championship were halted as he suffered a brutal knockout at the hands of Alexander Povetkin.

In a fight that Whyte had dominated for the opening four rounds, he was put to sleep in the fifth by a stunning uppercut from the 40-year-old Olympic gold medal winner.

“I didn’t feel that I would finish the fight like this. I was pretty confident in the fourth round that, even though I went down twice, it was OK. It wasn’t too much damage," Povetkin said.

“I was watching his fights and taking into account that he was missing uppercuts from the left and from the right. During my training, I was training on putting combinations around those shots.”

Povetkin felt the uppercut that closed the show was best punch that he ever landed in his career - stating “Yes, definitely” when asked in the aftermath.

According to Whyte's promoter, Eddie Hearn, they are going to exercise an immediate rematch clause.

Povetkin will do whatever his promoter, Andrei Ryabinsky, agrees upon with Hearn.

“First of all, my future plans don’t depend on me, it’s more a question for my promoter and for Eddie Hearn. So we will see what they decide. At the same time, I want to thank Andrei Ryabinsky and Eddie Hearn for everything they do for me," Povetkin said.

There were many who felt Povetkin was too old and too faded to pull off the upset - but the Russian veteran is not bothered by their words. 

“I don’t have anything to respond to those people. I just want to box more. I want to thank all of the fans who believe in me," Povetkin said.