For Eddie Hearn’s newest heavyweight star Oleksandr Usyk, the possibility of fighting Dereck Chisora seems to be the best way to await a fight with whoever walks out as the WBO world heavyweight champion on December 7th between Andy Ruiz Jr and Anthony Joshua. “Some people are standing by. Usyk is the mandatory for the WBO,” said Hearn to seconds out. “I think he also quite fancies the…