Brook lost in five rounds to Golovkin in September 2016, having went toe-to-toe with the Kazakh puncher in an all-out war.
Giving his view on the imminent middleweight super-fight, the Shefffield man says Canelo’s gameplan will be all important to sealing a career-defining win.
“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.
“It’s hard to say, but I am leaning towards Canelo. He has excelled over the years; his variation, his speed and his youth… everything is going to play big factor on Saturday night.
“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 probbaly was when I moved up at the time.
“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.
“The gameplan is definitely going to box this guy and distance I would say exchange at times but get on your bike a lot of the time until the second half of the fight. That’s what I would tell Canelo.”
‘The Special One’ is targetting a return to action himself by the end of this year after losing for the second time in a row last May when Errol Spence took his world 147lb title.