Xhaka will great arsenal christensen

I think there may be a bit of a misunderstanding here!

Granit Xhaka is a Swiss professional footballer who plays as a midfielder for Arsenal FC, but he is not going to "great" Arsenal, as in, he won't be transforming the team into something greater.

Andreas Christensen is a Danish professional footballer who plays as a centre-back for Chelsea FC, not Arsenal FC.

So, unfortunately, it seems like there's no connection between Xhaka and Christensen that would lead to a "great" Arsenal team.