Former world title challenger Javier Maciel (24-2, 16 KOs) of Argentina ranked by the WBO at #7 at 154 stopped Anderson Clayton (39-8, 34 KOs) of Brazil in round four. The end came just seconds before the end of round four when Maciel scored a vicious left hook to the body which dropped Clayton. The referee then issued the full 10 count while Clayton stayed down. The bout took place at the Ce.De.M. Nº 2 of Caseros in Buenos Aires, Argentina. Mario Margossian/Argentina Boxing Promotions promoted the event with TyC Sports.