Robert Guerrero is confident he will prove that he is the best in the world when he faces Floyd Mayweather at the MGM Grand in Las Vegas on May 4. After moving through the weight classes to become interim WBC welterweight champion and seek a fight with Mayweather. His dream has become a reality. Mayweather just turned 36, and Guerrero believes the evidence in his last fight with Miguel Cotto a year ago suggest Mayweather is slipping.
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