Floyd Mayweather Jr. will fight Marcos Maidana on Saturday night in a massive Showtime PPV event that will see both fighters put belts on the line. Tonight's boxing event has a number of big undercard fights too, with Britain's Amir Khan fighting New York's Luis Collazo. The main fight card, consisting of four top fights, will start at 9 p.m. ET and can be watched on TV on Showtime PPV, or the action can be watched online through free live stream.
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