if Canelo loses to 40 year old Golovkin he can kiss goodbye to any kind of legacy as in many people's eyes it'll be 3 straight losses to him despite the dodgy official results. Hard to see him losing though, GGG looked liked in recent bouts that when he took blows to his body it was taking it's affect and it was only his boxing skills that got him though against lesser opponents, Saul will target his body all night long because both are pretty much unknockoutable, Canlelo on points seems the likeliest outcome especially considering triple G has noticeably slower movements recently which at his age is expected. One of the judges (Weisfeld) scored Canelo the win in the second fight v GGG but had Bivol beating him as well, can probably file him under legit as the 2nd fight of this triology was definitely closer than the the first. Moretti another judge, had GGG beating Canelo in the first, but then Canelo winning the second, also had Bivol beating him, also seems fairly legit, the third judge Sutherland has had 750 fights with no real controversy though this is the biggest fight he's worked on. I think whoever wins based on this, wont be because of dodgy rulings at the very least.
Hope GGG wins, but expect the ginger Mexican to outpoint him just.