Zhang has an iron (thus far) chin and an abundance of power and Dubois gets hit. Dubois can punch but I haven't really seen anyone dent Zhang. Zhang also has far faster hands and Dubois can be beaten down. Zhang is gonna land faster earlier and we've seen Dubois down and hurt early. There is no foregone conclusion that he makes it to the later rounds to be able to capitalize Zhang tko4
David Tua got ko'd in the amateurs and was never dented as a pro, Zhang was dropped not stopped as I recall................also, Zhang had nowhere near the sheer mass he has now. Dubois isn't Wilder, but he was counted out by a jab by a non-hitter.................And he still has to contend with real power and a real speed disadvantage. And he has been hurt and beaten up before.