Gennady Golovkin is a middleweight boxer.
The men 's 2003 World Amateur Boxing Championships were held in Bangkok , Thailand , from July 6 to July 13 . Gennady Gennadyevich Golovkin ( Геннадий Геннадьевич Головкин born 8 April 1982 ) is a Kazakhstani professional boxer who currently holds the unified WBA ( Super ) , WBC , IBF , and IBO middleweight titles . As of May 2017 , he is ranked as the world 's best middleweight by BoxRec and the Transnational Boxing Rankings Board , and second best by The Ring . After Canelo Álvarez vacated his WBC middleweight title in 2016 , Golovkin was elevated to full champion and now holds world titles by three of the four major boxing sanctioning bodies . In his amateur career , Golovkin won a gold medal in the middleweight division at the 2003 World Championships .