Undefeated heavyweight champion Floyd Mayweather is set to fight his next opponent Andre Berto. The fight will go down on September 12th. If Mayweather wins against Berto it would tie with Rocky Marciano’s legendary undefeated retirement record of 49-0.   SOURCE

On February 25, 1989, Boxer Mike Tyson becomes the undisputed Heavyweight Champion of the World by defeating challenger Frank Bruno of England.   SOURCE: http://blackfacts.com/