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 on Canelo Alvarez and his camp issued a challenge to unified middleweight champion Gennedy Golovkin, following Alvarez’s knockout victory over Amir Khan.Published May 8, 2016SI STAFFShare on FacebookShare on XHome/Boxing