Maskaev had a glass jaw. you are right in that Povetkin would be well ahead late in the fight. wrong in thinking Povetkin would fold like Maskaev.
Wasn't Tua working with Roach for the Byrd match? I could be mistaken, but I think I remember reading that Tua did hardly any roadwork for that fight, and instead, he was spending long hours in an ice tube in place of roadwork.