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.
The controversy didn't die down with the disputed decision - the original date for rematch had to be reworked because Saul failed a PED test, his reasoning: it must have passed through his system courtesy tainted meat he'd eaten in his native Mexico.
The two return Saturday night for a rematch on the Las Vegas Strip that might be even better.
Oddsmakers are expecting the fight to go the distance again. He has had 13 world title fights and won championships at 154 and 160 pounds.
Golovkin (38-0-1, 34 knockouts) is a slight favorite in the rematch, much as he was in the first fight.More news: Justin Bieber & Hailey Baldwin Got Married In Secret!
A fight that had to happen after the disputed draw in the first bout nearly didn't come to be after Alvarez tested positive for clenbuterol just before beginning training for what was supposed to be a May rematch.
Golovkin, who most observers believe should have been awarded victory in last September's drawn first fight, has rubbished Alvarez's explanation for the failed drug tests.
"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". He can only talk about the doping that got him suspended for six months by Nevada boxing authorities, but he can do something in the ring to alter the perception that his style is too conservative.
Triple G's trainer Abel Sanchez also added fuel to the fire after their first bout by accusing both Canelo and his team of wrapping their fighter's hand in an illegal manner.
"At the moment I put him in the top five, and the only reason I don't put him any higher is because he needs that fight that people recognize, the signature fight or legacy fight", Sanchez said. "Injection marks were evidently there", Golovkin said.
"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. "It's a real fight, a real war". "It's a little bit different this time, but I believe it will be a big fight for the fans". 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.