By Fernando Schwartz, notifight.com

Juan Manuel Marquez has refused to back the actions of Floyd Mayweather Jr., who landed two punches on a defenseless Victor Ortiz to score a fourth round knockout on Saturday night at the MGM Grand in Las Vegas. After landing a deliberate head butt on Mayweather, Ortiz was penalized a point by referee Joe Cortez. Ortiz, who apologized to Mayweather with a hug, is claiming that Cortez never signaled to resume fighting so his hands were both down when Mayweather "sucker punched" him a split second after the hug.

Marquez doesn't place the blame all on Mayweather. He doesn't like what Ortiz did with his head or the performance of referee Joe Cortez.

"I think what made ​​Victor Ortiz did is unacceptable. A head butt is something for the street and not worthy for a professional boxer in the ring. And Mayweather, he would retaliate with more street fighting. The referee says you should never let your guard down, but the referee never restarted the fight. It is controversial what they did," Marquez said.

"The fight should have been marked invalid. The referee must stop the bout to speak to a commissioner in the ring and then restart the fight. They give Mayweather a knockout and there is a serious error with everyone, including the Commission of Nevada. A fight that was starting to turn good was spoiled for everyone."

"Despite the referee's advising you in the dressing room tells you that you should always protect yourself, there is something called professionalism. There is sportsmanship and professionalism. The November 12 fight [against Manny Pacquiao] will be fair and you can look for a clear winner in the ring."