On Sept. 14, Floyd Mayweather Jr. will go for his 45th career win when he takes on Saul “Canelo” Alvarez. The two will face off at the MGM Grand in Las Vegas for the WBC/WBA Super World light middleweight title.

Most in the boxing world expect Mayweather to remain undefeated. He’s a -270 favorite and has won by either unanimous decision or knockout in his past six bouts. Recently, Manny Pacquiao trainer gave his two cents on the upcoming fight.

“I think that is a very, very good boxing match,” said Roach. “It’s not a great fight; it’s a good boxing match. Mayweather is a beautiful boxer and I think Mayweather will win a decision in that fight. I think a boxing fan will really like that fight but some people at home that like action might fall asleep. But it’s a great boxing match.”

Although it would be a major upset if Mayweather were to lose, Alvarez may be the toughest opponent he’s faced in a few years. In Mayweather’s last three fights, he’s never been less than a 6/1 favorite. Still, Roach doesn’t give the 22-year-old much of a shot to make history.

“Well you know [Alvarez is] a pretty good puncher and a tough guy,” Roach continued. “But does he have a chance at beating Mayweather? I don't think so. I like Canelo and I hope he does well.”

If Roach wants a fight between Mayweather and Pacquiao to ever happen, it might be best that the undefeated boxer loses. Mayweather has scoffed at a bout with Pacquiao after his back-to-back losses to Timothy Bradley and Juan Manuel Marquez.

On November 24, Pacquiao will have a fight of his own against Brandon Rios. It’s essentially a must-win situation for Pac-Man, who could call it quits if he picks up a third straight loss. Roach has advised Pacquiao to retire if he gets knocked out by Rios.

Pacquiao, however, isn’t expected to have much trouble with Rios. He’s an even bigger favorite than Mayweather. Pacquiao’s betting odds have been set at -400, while Rios is at +300 four months before the fight.