User blog comment:Luffy1999/Top Strongest Characters/@comment-85.64.80.184-20170521142741/@comment-26871105-20170522015837

Zeno said that he almost sure to win if he's pitted against Chrollo unless the latter is deadset on killing him, which would be a "different matter". It doesn't mean that Zeno will lose, it just means that he has a chance of losing.