Undefeated Floyd Mayweather will
attempt to match Rocky Marciano’s
record of 49 victories without defeat
against Andre Berto on 12 September. Former welterweight world champion Berto, 31,
has a record of 30 victories with three defeats. Source: BBCTO GO WITH AFP STORY Floyd Mayweather Jr. smiles in the ring during his fight against Juan Manuel Marquez at the MGM Grand Garden Arena September 19, 2009 in Las Vegas, Nevada. Mayweather won by unanimous decision.   Ethan Miller/Getty Images/AFP (Photo credit should read Ethan Miller/AFP/Getty Images)

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