Former IBF welterweight champion Kell Brook (36-2, 25 KOs) is fully backing Canelo Alvarez (49-1-1, 34 KOs) to shock IBF, IBO, WBA, WBC middleweight champion Gennady Golovkin (37-0, 33 KOs) on Saturday night at the T-Mobile Arena in Las Vegas.

Last September, Brook moved up by two weight divisions to face Golovkin at the O2 Arena in London.

The Sheffield boxer started well and landed hard shots on Golovkin, but along the way he suffered a fractured orbital bone and was stopped in five rounds.

Brook believes that he created a blueprint for boxers to use, and felt Daniel Jacobs used some of those tactics back in March - when he forced Golovkin to go the full twelve round distance for the first time in his career. Coming in, Golovkin had stopped 23 opponents in a row.

"You're only good as your last fight and I just think his days are numbered," Brook exclusively told Sky Sports. "We've seen the best of him and I think people actually know - and this is a big factor - he is just human. Everyone thought he could walk through everyone and most of the fighters he fought were beaten before they were hit.

"Now they know he is human. He can be hit and he can be out-boxed, he can be beaten and top fighters are going to go in with that mentality. As long as they have trained properly and believe in themselves, they will beat this guy at middleweight."

Brook feels confident that Canelo has the youth, the speed, size and more importantly, punching power, to derail Golovkin.

"I still think I showed a blueprint on how to beat Golovkin and it was touch-and-go if he won the fight with Jacobs. I just feel Canelo can win this fight if he sticks to a gameplan and boxes the right fight - it's just how Canelo copes with how Golovkin cuts the ring down as well as his big punching power. He is there to get hit Golokvin, you can hit him and he (Canelo) carries more power is bigger than I probably was when I moved up at the time," Brook said.

"He's got the power, he's got the movement, he's got the boxing brain, he's Mexican, he uses the ring very well, so if he doesn't get caught early and tries to exchange, he will stick to whatever gameplan they chose."