By a narrow decision, Canelo Alvarez is the new World Boxing Association and World Boxing Council middleweight champion — handing Gennady Golovkin the first defeat of his professional career. (Photo by Joe Camporeale / USA TODAY Sports) #CaneloGGG2 #Canelo #GGG #canelo #golovkin #mexico #TeamCanelo #TeamGGG #CaneloGolovkin2 #boxing #lasvegas #rematch #majoritydecision #middleweight #belts #upset #middleweightchampion #champion