Never rated Dubois, wouldn't have even favoured him before his loss to Joyce but now, I think Zhang KO's him early. Dubois would go right at the counter puncher because he has no other way of fighting and walk into a big shot and get slept.
Never thought much of Dubois, nor consider him to be a particularly hard matchup stylistically for anyone with a bit of quality. His face is also very soft and prone to puffing and bruising so it's unlikely he stands up to Zhang's repeated left hands strafing his grill.