If Zhang wins the rematch vs Joyce and Usyk defeats Dubois, who wins this match up? If Zhang is aggressive like Chisora was I think Zhang has a good chance of causing the upset vs Usyk.
I would give Zhang bigger chances if he was younger, I believe with better cardio. But is still capable of giving Usyk a hard fight. It won't happen, Zhang will be too old until then and it's all "if".
Assuming undisputed doesn't go through (Fury won't allow it), Hrgovic would be the next mandatory, and I think Zhang would be next. We might see Big Bang get a shot one day. As for the fight, I'd give Zhang a better shot than most because he's a southpaw with good handspeed and power to burn. I think there's a possibility that he could catch Usyk more often than Dubois or Hrgovic could. I still think Usyk would survive into the later rounds and outwork him.
Feel like Zhang would do better than people think, but I still see Usyk easily outpointing him. Would be a cool fight though, a slickster vs. a powerhouse and both are southpaw. I'd personally love to see it because I really love watching both, so either way I'd walk away pretty damn happy.
