The fight, which takes place at T-Mobile Arena ( strong HBO PPV, 8 p.m. ET /strong ), is a rematch of their controversial split draw last September in an action-packed bout which produced 1.3 million PPV buys. "I defeated the weigh-in, and now it's time to defeat him [Saturday] night".
We then break down the main event below in BTSport.com's big fight preview, which also includes the best of our huge collection of exclusive build-up video content.
The 2004 Olympic silver medallist, (38-0-1, 34 knockouts), has repeatedly accused his Mexican opponent of doping, raising the temperature in Las Vegas this week by voicing his suspicions again. All three judges agreed Alvarez won the first two rounds and the last three. After that point, Alvarez chose to lean against the ropes, let Golovkin start teeing off and most importantly, gain confidence and got out to what appeared to be a sizable lead on the scorecards.
Alvarez must prove his career has been authentic. Sooner or later, it will eventually catch up to him and it nearly did in the first fight. All of those variables were caused by continuing to be on the ropes and the constant pressure applied by Golovkin.
"He's promised the fans he's going to knock him out but in order to do that you have to be in range and then it gets unsafe", Sanchez said.
Alvarez looks leaner heading into the grudge match.
Not wanting to risk a period of inactivity, he remained determined to fight on May 5th, taking on former world title challenger Vanes Martirosyan in a hastily-arranged clash at the StubHub Center in Los Angeles.
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The fight wasn't the "big drama show" that Triple G likes to talk about, with neither fighter down and neither fighter really hurt. Alvarez, 28, has maintained his innocence, citing tainted meat in Mexico after he tested positive for the banned substance clenbuterol.
"I am bothered by all the stupid things (Golovkin's team) have been saying and I have been using it as motivation for this fight". The two fighters didn't engage in the traditional faceoff after Wednesday's press conference at the MGM Grand.
"This fight means a lot to me because of all that has happened and all that has been said", Alvarez said. "I'm angry, but I'm going to use it in my favor for this fight". "But I'm going in there to knock him out".
The Mexican star has to stay composed. "Injection marks were evidently there", Golovkin said. Anyone in their right mind would be.
A stony-faced Alvarez meanwhile claimed a psychological victory.
He's more than talented enough to end Golovkin's stranglehold on the middleweight division.