Floyd Mayweather predicts the winner of Canelo Alvarez vs Gennady Golovkin super-fight
Golovkin has yet to lose in his 37-fight pro career and holds the WBA, WBC, IBF, and IBO middleweight titles. Mayweather remains the only boxer to stop Alvarez and is backing his former rival to strip Golovkin of his belts and become the new middleweight king.