Gennady Golovkin boxes.
The men 's 2003 World Amateur Boxing Championships were held in Bangkok , Thailand , from July 6 to July 13 . BoxRec or boxrec.com is a website dedicated to holding updated records of professional boxers , both male and female . Gennady Golovkin . Golovkin is also said to have one of the best chins in modern boxing , having never been knocked down or knocked out in a total of 387 fights , neither as a professional nor amateur . Milton Núñez ( born September 25 , 1987 ) is a Colombian middleweight boxer . 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 ) .