Lineal and Ring Magazine Middleweight World Champion Canelo Alvarez (49-1-2, 34 KOs) and WBC/WBA/IBF/IBO Middleweight World Champion Gennady "GGG" Golovkin (37-0-1, 33 KOs) hosted a blockbuster fan event at Microsoft Square at L.A. LIVE to formally announce their historic, highly anticipated 12-round rematch at T-Mobile Arena, September 15th LIVE on HBO PPV. SUBSCRIBE: www.youtube.com/goldenboyboxing