Canelo Alvarez and Gennady Golovkin II at T-Mobile Arena in Las Vegas, NV

Lineal Middleweight World Champion Canelo Alvarez (49-1-2, 34 KOs) and WBC/WBA/IBO Middleweight World Champion Gennady “GGG” Golovkin (38-0-1, 34 KOs) will return to the T-Mobile Arena in Las Vegas for their historic 12-round rematch on Saturday, Sept.