Gennady Golovkin is a middleweight boxer.
Gennady Golovkin . Golovkin won his first major world championship , the WBA interim middleweight title , by defeating Milton Núñez in 2010 . 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 .