LAS VEGAS (AFP) — Saul "Canelo" Alvarez and Jermell Charlo both weighed in at 167.4 pounds on Friday ahead of their duel for Alvarez's undisputed super middleweight world titles.

Charlo, himself the undisputed junior middleweight world champion, will be at his heaviest fighting weight ever as he steps up to the 168-pound (76.2 kg) division for the first time aiming to grab Alvarez's International Boxing Federation, World Boxing Association, World Boxing Council and World Boxing Organization belts.

Both fighters looked relaxed and faced off without incident on the outdoor stage erected near the T-Mobile Arena, where a throng of fans jockeyed to capture images on their cellphones to the strains of mariachi music.

The ritual step on the scales, followed by a stare-down, followed an official weigh-in behind closed doors earlier Friday, under the eyes of Nevada State Athletic Commission officials.

"It's time to fight," Charlo said, adding that he didn't care that Alvarez had been the focus in the build-up to the bout.

"It don't matter how they hype him up," Charlo said. "They got it popping in here. I live it, I enjoy it. I do this for us, baby."