Man utd clash biggest in history and fans cant come lask chief

I think there may be a bit of a language barrier or misunderstanding here!

It seems like you're trying to ask about a big match between Manchester United (Man Utd) and another team, but the fans can't attend due to the Chief (I'm assuming you mean the Chief Executive or a high-ranking official) of the club?

If that's correct, I'd be happy to help you with that!