The pair fight live on DAZN on January 27, when Munguia defends his unbeaten record against Ryder, who suffered a defeat to Canelo Alvarez in Mexico last May.

Munguia had been working with trainer Erik Morales, but he switched to Roach ahead of his upcoming fight.

Roach has worked with the likes of Manny Pacquiao, Mike Tyson and Oscar De La Hoya and is regarded as one of the best in the business.

Speaking to BoxingScene.com, Roach explained that he saw few vulnerabilities in Munguia.

“There's a big thing out there that he has poor defense and so forth. He doesn't have poor defense. We work on those things every day. He's a complete fighter and that's why he's going to win the fight,” he said

“I think his work ethic is a lot better than most. He comes to the gym everyday wanting to work. We work really well together. I push him and he pushes me. We work the mitts together and a lot of combinations. People who say he's a single puncher and stuff like that are full of sh!t.”

Roach continued: “I saw a lot of tape on Ryder. He's a decent fighter, but he's not as good as us.”

The coach said an impressive win could launch Munguia onto a title fight, adding: “A 100 percent yes. This will break the doors for us. We want the biggest and baddest guy out there next, and we'll see.

“[Munguia] knocks [Ryder] out inside of eight rounds.”

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