Gennady Golovkin boxes.
Gennady Golovkin . He was elevated to WBA ( Regular ) champion in the same year , and in 2011 would win the vacant IBO middleweight title by defeating Lajuan Simon . An interim championship is an alternate title that is awarded by the four major sanctioning bodies of professional boxing ( WBA , WBC , IBF , and WBO ) , and in other combat sports such as kickboxing and mixed martial arts . The International Boxing Organization ( IBO ) is a non-profit organization that sanctions professional boxing matches and awards world and regional championships . The World Boxing Council ( WBC ) is one of four major organizations which sanction world championship boxing bouts , alongside the International Boxing Federation ( IBF ) , World Boxing Association ( WBA ) and World Boxing Organization ( WBO ) .