The Mexican and Kazakhstani shared a controversial draw in Las Vegas a year ago.
They were supposed to meet in a rematch in May before Canelo tested positive for the banned substance clenbuterol – claiming it was due to contaminated meat.
Now after plenty of bad blood and verbals the pair will settle their differences once and for all at the T-Mobile Arena.
Golovkin, 36, feels he was robbed in the first meeting and is the favourite going into the showdown.
However, former British WBA heavyweight champ Haye told Betfair he believes the 28-year-old Canelo will emerge victorious out of the middleweights.
Haye, who retired in June aged 37 after his loss to David Bellew, said: “The delay that's happened between these fights, because of Alvarez' drug ban, I believe will have worked in his favour.
“He's the younger fighter by almost nine years. I know first-hand what impact age can have on a fighter.
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“Every month that goes by, Golovkin gets slower, older and you start to favour Canelo.
“I'm a fighter, I've experienced the deterioration in my reflexes, speed and timing within a 12-month period.
“GGG is a similar age to myself and believe me, this delay will work in a young man's favour.
“Experience comes with age, which in some scenarios can play to a boxer's advantage over their younger opponent but in this situation it's not the case.
“Canelo has been a professional since he was a teenager and has 13 more fights than Golovkin. He has fought on the biggest stage and sold out the arenas time and time again.”
Despite many being outraged by the draw verdict last time out, Haye also feels that fight fans were the true victors.
He explained: “I don't feel the draw in the first fight between Gennady 'GGG' Golovkin and Saul 'Canelo' Alvarez was the best decision the judges could have made on the night.
“I, personally, had a couple of rounds in GGG's favour but admittedly being just two rounds ahead in a 12-round fight is by no means a decisive win.
“In high-profile fights you're rarely going to 100% agree with the judges, however with the rematch taking place this Saturday, it's turned out to be a great decision for boxing fans because we get to watch these boxers go toe to toe once more.”
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