By PJ Rivera ( | First Posted: Aug 22, 2013 01:34 PM EDT

(Photo : REUTERS/Adrees Latif)

Sugar Shane Mosley previously said that Saul "Canelo" Alvarez had a good chance against Floyd Mayweather Jr, but world-renowned trainer Nacho Beristain believes otherwise.

Beristain, who has handled several champion boxers throughout his entire career, said that he would love to see Alvarez defeat Mayweather in their World Boxing Council and World Boxing Association junior middleweight title showdown on Sept. 14 at the MGM Grand in Las Vegas.

The trainer, who currently handles Juan Manuel Marquez and Jhonny Gonzales, said that an Alvarez victory will elevate Mexican boxing to another level, but he firmly believes that Mayweather is too much for the 23-year-old Canelo.

"I hope he wins as it would be marvelous for Mexican boxing if he were to win but I think it will be difficult," Beristain said in an interview with Boxing Scene. "I've always thought Mayweather was a fighter who is totally defensive. He's smart, very intelligent and in a totally different category. I think if he prepares very well, I think he will be the winner."

When asked who he thinks is capable of handing Mayweather the first defeat of his illustrious boxing career, Beristain stopped short of saying no one can handle the undefeated American.

"Only a fighter who goes into the ring with a bat," Beristain said.

Beristain actually had a chance to deal Mayweather his first defeat in 2009 when Marquez challenged the fighter dubbed as "Pretty Boy." The Mexican warrior moved up two weight classes to challenge Mayweather, but Marquez ended up being dominated by the Grand Rapids native in 12 rounds.

"That fight was stupidity. I don't know whose idea it was and I don't even want to investigate who but a guy like Juan with the stature of a featherweight shouldn't have fought that fight. It went the 12 rounds only because he's a great fighter but Mayweather is different," Beristain said.

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