Three days before they launch punches at Dignity Health Sports Park, WBC super featherweight world champion Miguel Berchelt and challenger Jason Sosa joined forces Wednesday afternoon for a WBC Cares event at The Rock Boxing Gym along with super lightweight contender Alex Saucedo.

A group of local children were in attendance, as the fighters showed them basic boxing techniques, signed autographs, and gave them each a ticket to Saturday's event.

After the boxing exhibition, the fighters and the children participated in a special Día de Los Muertos celebration, where they each wrote the name of a loved one they wanted to memorialize on a giant boxing glove.

"I feel very happy," Berchelt said. "It's very nice for me to teach the kids how to be disciplined so they can go far in this sport."

"It's a great feeling to spend time with the kids and show them what we do," Sosa said.

Said Saucedo: "A lot of them already knew how to fight, how to box. It's awesome to come and work with them."

Berchelt-Sosa will headline a world championship doubleheader (10:30 p.m. ET, ESPN), as Jerwin Ancajas will defend his IBF junior bantamweight world title against Jonathan Rodriguez in the co-feature. Saucedo will take on Rod Salka in an eight-rounder (ESPN+, 6:30 p.m. ET) in his first bout since being knocked out by Maurice Hooker in a bid for the WBO 140-pound world title last November.

"This will be the next classic in the Mexico versus Puerto Rico rivalry. We are two fighters who always bring excitement to the ring, and this Saturday will be no different. There are many great fights for me in the future, but I know I need 100 percent focus to beat a great former world champion like Sosa," Berchelt said.

"The fans who watch this fight will be the winners. When you have two warriors in the ring, great things happen. I refuse to disappoint the fans. I fight for them."

"I had a great training camp in Hermosillo, Mexico, with my trainer, Alfredo Caballero. We prepared to fight the very best version of Jason Sosa. After the fight, we can discuss the future."

"It is no secret that Oscar Valdez is a fight I want. He is at 130 pounds now, and if we both win our next fights, let's make it happen. There is no hesitation on my end. Lomachenko is another fight I'd gladly accept. I'm a fighter, and I want to fight the very best."