The highly anticipated rematch between unbeaten WBO light flyweight champion Ivan “Iron Boy” Calderon (32-0-1, 6 KOs) of Puerto Rico and 3 time world title challenger Rodel Mayol of the Phillipines (25-3-1, 19 KOs) is now official and will take place September 12. The event titled “Undefeated Champions”, will take place at the Coliseo Jose Miguel Agrelot in Hato Rey, Puerto Rico and is being promoted by PR Best Boxing (Ivan & Peter Rivera). Neither Calderon nor Mayol have fought since their bout this past June at the Madison Square Garden. The fight was halted after six rounds due to a cut suffered by Calderon as a result of an accidental headbutt in round four. The bout then went to the scorecards where one judge had it for Calderon, one had it for Mayol, and one had it even making the result a draw.