Floyd Mayweather lands a hard right to the face of Arturo Gatti during their 2005 fight. Mayweather, who fights Miguel Cotto on Saturday, knocked out Gatti in the fifth round for the victory. (AP)

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Antonio Margarito puts the finishing touches on Miguel Cotto in the 11th round of their 2008 fight. The two will face off again on Saturday. (AP)

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