The undefeated American boxer Floyd Mayweather will attempt to match Rocky Marciano's record of 49 unanswered victories when he takes on Andre Berto in September.
Mayweather has announced the bout against the Haitian-American Berto in Las Vegas on September 12th.
Former welterweight champion Berto has 30 wins and three losses.
Mayweather, who beat Manny Pacquiao in May in what was billed as the "Fight of the Century", will risk his WBC and WBA welterweight world titles against the power-punching, two-time welterweight world champion Berto.
A victory for Mayweather would match the record of the late heavyweight champion Rocky Marciano, who retired in April 1956 with an unblemished record of 49 and 0.
Mayweather says he's ready to get back in the ring and prove again to the whole world why he's 'The Best Ever.'
Berto, who has lost three of his last six fights, sounded a confident note about finding the range against the elusive Mayweather, the 38-year-old who's rated one of the greatest defensive fighters of all-time.
Berto says he's going to "kick Floyd's ass" and the 31-year-old's not concerned about what 48 other fighters have been unable to do.
The match will be the sixth and final fight of a record-breaking deal between Mayweather and Showtime Networks, leading to speculation it could be the farewell match for the American.
A world champion in five divisions, Mayweather made a reported 337 million dollars from his unanimous decision over Pacquiao in the most lucrative fight ever staged generating close to $900 million in revenue.
Two other World Championship fights are also planned for the undercard of the pay-per-view telecast.
Roman "Rocky" Martinez (29-2-2) will risk his WBO junior lightweight title in a rematch against the boxer he dethroned, four-time world champion Orlando "Siri" Salido (42-13-2).
Badou Jack "The Ripper" (19-1-1) will make the first defence of his WBC super middleweight title against mandatory challenger "Saint" George Groves (21-2, 16 KOs).