Combos and speed and someone with power make GGG look befuddled very stiff. He is technically sound with a good chin....he's not a bum....but I can't see Canelo losing.
The length of GGG's last opponent gave him some trouble. Canelo is actually shorter, so GGG won't have that issue.
Also, Canelo has fast hands and decent pop, but he doesn't have much lateral movement. GGG won't have an issue getting to him.
GGG UD.