Dokes would smoke him, especially the young Dokes who still had good mobility but I'd fancy the old Dokes who fought Holy to beat Povetkin on points.
Just about any version of Dokes wins this one in a landslide. Too skilled, and WAY too much handpeed for the plodding Povetkin. If Marco Huck can get Povetkin in trouble, then a Prime Dokes can definitely put him to sleep. I think even the Dokes who got knocked into a coma by Ruddock could even beat Povetkin. Prime Dokes by easy decision or mid round stoppage.