Ahead of the fight, the two fighters faced a flood of press and fans at the MGM Grand in Las Vegas, with Golovkin taking the opportunity to parade his belts in front of the cameras.
Carrying only one bag, he flew to Los Angeles in 2010 to work with Big Bear-based trainer Abel Sanchez in preparation for a nontitle fight in Panama.
At 35, Golovkin is eight years the senior of Canelo, but the Kazakh insists he is feeling as good as ever and believes he can continue to box into his fifth decade.
If Golovkin gets to rattle Alvarez with his punching power, however, he can not expect the Mexican to just fold up and be a stationary target because Alvarez has good ring movement and knows how to bob and weave.
From the opening bell, Golovkin's jab was in sublime form, with GGG throwing his left hand with subtle variations of rhythm and power which kept the Canadian on the back foot struggling to dictate or cope with the pace. Who I am? Canelo?
His last fight against Julio Cesar Chavez resulted in a comfortable points win but sparked boos from a crowd unimpressed by Chavez's survive-at-all-costs approach.
Alvarez's familiarity with his surroundings means little to Golovkin, who said: "It's not special". But it's a superfight just the same and may be more important than others in recent memory simply for the timeless message it presents: That it's essential for the best to fight the best, regardless of danger, in order to uphold the overall health of the sport. Others, meanwhile, were more of a passing of the torch than a showdown between two prime fighters looking to take that next level to legendary greatness. "I've got through my first 24 fights on skill, now I have the conditioning to produce the very best performances of my career". "Right now I think new stories, new times for us". I prepared myself for the knockout.
"It feels great because the negotiations were a bit complicated", Alvarez said.