Canelo Alvarez and Gennadiy Golovkin are bringing a big grudge to their Sept. 17 trilogy fight. Canelo Alvarez and Gennadiy Golovkin are set to meet for a third time on Sept. 17, with all four of Canelo’s super middleweight titles — the undisputed championship — on the line in a DAZN pay-per-view main event. Canelo (57-2-2, 39 KO) and Golovkin (42-1-1, 37 KO) met up today to announce this fight officially in Los Angeles, and there was plenty of heat in their stare down. Here’s the face off between the two fighters: We. Can’t. Wait. #CaneloGGG3 pic.twitter.com/bpLps4Nl6B — DAZN Boxing…