By Miguel Rivera

Former four division world champion Juan Manuel Marquez disagrees with his career trainer Nacho Beristain, regarding the issues of keeping Julio Cesar Chavez Jr. at the Otomi Ceremonial Center until April 28th.

Chavez Jr. hired Nacho to prepare him for the upcoming showdown with Saul "Canelo" Alvarez on May 6th from the T-Mobile Arena in Las Vegas. The fight takes place at a catch-weight of 164.5-pounds.

BoxingScene.com reported last week that Nacho and Chavez Jr. had an argument in camp, because the boxer wanted to leave Otomi and continue the training camp in Mexico City. Nacho stood his ground and threatened to walk away from the fight - which forced Chavez Jr. to remain in place.

And while the high altitude training facility will help Chavez Jr. with strength and stamina, Marquez believes that remaining in a location that is so high above sea level for such a long period of time will not help the boxer with speed - which is what he needs against Canelo.

"I do not share the opinion of what Nacho Beristáin is saying. Strength is going to be important but more important is going to be speed, which is the key point. He needs to relocate to a lower altitude and train at less height because in this fight everything is important, but the most important thing is speed," Marquez said to ESPN Deportes.

"Canelo Alvarez is a good counter puncher, who has speed, who has power, unlike Julio Cesar Chavez Jr. who will arrive with great strength but very slow and that is a factor that will not favor him. You can not work on speed at a high altitude like that.... you gain a lot of strength, it gives you great conditioning, you're strong - but Chavez Jr. needs to work on speed, because speed does not catch on at first... you have to do it gradually and what Chavez Jr. and Memo Heredia were thinking [in terms of heading to Mexico City] was fine."

"Three weeks to bring up the speed, little by little, and thus lose weight, because even with the cold [at Otomi] it does not favor Chavez Jr. because that will affect him with losing weight. And if he goes down to Mexico City to train and from there to Las Vegas - it would have been very positive for Chavez Jr. in both areas - speed and weight."