Their first fight last September ended in a controversial draw when each fighter got the nod from one judge, while the third declared it a tie, allowing Golovkin to retain his World Boxing Council, World Boxing Association and International Boxing Federation belts. He has had 13 world title fights and won championships at 154 and 160 pounds.
The clown show by Floyd Mayweather Jr., and Conor McGregor a few weeks earlier cast a long shadow on a middleweight title bout that turned out to be quite a show itself.
It will be a hot night in this bad town on Saturday.
As fans, we were happy because we get to see the fight again.
And this time it's personal.
The Golovkin camp has been relentless in chastising Alvarez for the failed test and postponement of the rematch.
"I don't believe all his stories about contaminated meat", Golovkin said this week.
"I think this fight could be it".
Luckily for Golovkin, he hasn't had to listen. But the fighters declined to hold a joint news conference when the new deal was finished, and they declined to go on a media tour or stand face to face at the final prefight news conference Wednesday.
When they finally do meet Saturday night it will be with some hard feelings on both sides that didn't surface in the first fight. He said he just got excited by the moment.
"I'm bothered by all the stupid things they've been saying and I've been using it as motivation in my training for this fight".More news: Sarri Concedes Chelsea Not Title Contenders This Season
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Tomorrow's second meeting is expected to exceed that number thanks to a wild 12 months which included Alvarez failing a pair of drug tests which forced the original May 5 date to be postponed.
A last minute agreement resolved the purse split, with Triple G getting closer to the 50-50 he was demanding.
An ill-tempered confrontation before several thousand fans at the T-Mobile Arena saw a minor scuffle after the two fighters came together after stepping on the scales.
Now the rematch has to live up to the hype. "When he weighs in [Friday] at 160 pounds, that will be the 390th time he has weighed in at 160 pounds [as an amateur and pro]".
'I defeated him at the weigh-in and I will knock him out in the fight'. And if he can deliver that great performance and he can this fight the way his legacy and his destiny require him to do, then he's made his statement.
Sanchez has carried much of the burden for the fight's promotion, as both fighters are more comfortable speaking in their native languages than in English.
A stony-faced Alvarez meanwhile claimed a psychological victory.
However, the only way to watch all four fights is to order Canelo vs GGG 2 and tune in on TV.
Canelo Alvarez came to the weigh-in looking for a fake fight before the world middleweight title fight with Gennady Golovkin. Judge Adalaide Byrd scored the fight 118-110 Alvarez over GGG, who many thought was the victor.
Alvarez, an excellent counter puncher and boxer, also has the advantage of having gone 12 rounds with Triple G and understanding how to avoid getting hit with his biggest punches.
Alvarez is 49-1-2 with 34 knockouts in his career. "Injection marks were evidently there", Golovkin said.