By Rick Reeno

Michael Koncz, the adviser to eight division world champion Manny Pacquiao, watched Floyd Mayweather's dominant performance over Robert Guerrero on Saturday night. After watching Mayweather's latest performance, Koncz is convined that there are only three fighters out there who are capable of handing the undefeated boxer his first loss.

He says Pacquiao (54-5-2, 38KOs), WBC/WBA junior middleweight champion Saul "Canelo" Alvarez (42-0-1, 30KOs), and WBC lightweight champion Adrien Broner (26-0, 22KOs) are the only fighters currently out there with the styles, and skills, to have any realistic shot at beating Mayweather (44-0, 26KOs).

"Floyd looked well. Floyd was Floyd. He did what he had to do to win. I really believe there is nobody out there who is a real threat to Floyd - other than Manny, Canelo and maybe Broner. Other than that, he's going to win every fight he takes," Koncz told BoxingScene.com.

"Guerrero is a world champion, he is good fighter, but Mayweather is in a different class. Other than those two or three people that I mentioned, [they are the only boxers who] I truly believe can give Floyd any trouble. Hand speed alone, that is not going to beat Floyd. You might be able to land some punches, but Floyd is a great technical fighter - he can adjust, he is very defensive, so I don't think hand speed by itself is going to do it."

Pacquiao returns on November 23rd against Brandon Rios. Mayweather is scheduled to return on September 14th. Canelo is targeting his return for the same September date and he has been pushing to get Mayweather in the ring. Broner will enter the welterweight ranks on June 22 when he challenges Paulie Malignaggi for the WBA title. Broner considers Mayweather a close friend and currently has no interest in fighting him.