I think Khan takes it to points, as he's focused more on defensive boxing since losing to Garcia. All Saul needs to do is win and he faces GGG in a super fight (which I might go see). Khan has emphasized speed for this match, and I think he will try to stick and move and stay away from Saul's power.
Alvarez will clinch, land bigger shots but I think like last fight, he could get conservative down the stretch (and he loses cardio b/c he throws so hard; I think that will be a prob vs GGG) and glide to a decision.
A side note, Tapia vs Lemieux is a motherfucker of a fight for an undercard.