This is a pretty evenly matched fight. Both are good heavyweights but neither can really be considered elite. I lean slightly towards Joseph Parker because he has actually won a world title. Chisora looked good against Usyk but he is reaching an age where most boxers start to think about retirement.
If he's (Derek Chisora) thinking towards retirement then why would he brought in a new trainer?, most of these fighters sometimes don't think about retirement but about titles. I read couple of replies and everyone seem to be on the side of the most favorite (Joseph Parker) but believe me the game will definitely change becasue of this new trainer he (Derek Chisora) got. With his stubbornness along with little changes to his previous fight anything can happen inside the ring in few hours from now.