Golovkin is getting on a bit, but Canelo is made for him IMO. Jacobs was a much trickier opponent because he was just so much bigger than GGG and on his feet so much. Canelo is flat footed, takes time off and Golovkin will hurt him for it. I can see Golovkin, if he is at his best, hacking down Canelo to the body early and taking down the head after the first few. I can see GGG stopping him between rounds 7 and 9.