Canelo Alvarez KOs Amir Khan, calls out Gennady GolovkinCanelo Alvarez and his camp issued a challenge to unified middleweight champion Gennedy Golovkin, following Alvarez’s knockout victory over Amir Khan.SI Staff|Share on FacebookShare on XAdd us as a preferred sourceCanelo Alvarez and his camp issued a challenge to unified middleweight champion Gennedy Golovkin, following Alvarez’s knockout victory over Amir Khan.Add us as a preferred source on GoogleFollowLoading recommendations... Please wait while we load personalized content recommendationsPublished May 8, 2016 | Modified May 8, 2016SI STAFFShare on FacebookShare on XHome/Boxing