I think Dirrell can step up. I am going to be honest Froch is not that talented he seems to get by with toughness and some pop.Froch in a way has still been babied who he has fought besides Taylor and Pascal. Those two are the toughest he's been in with.Dirrell is not far behind those guy's. In my mind he is much quicker and slicker than either of those two but the question that he must answer is the chin. Can he dish it and can he take it and we do know Froch will be there in the end.I don't think Dirrell has the pop to stop Froch but he certainly could easily outbox Froch if his chin is solid.