Arsenal could be facing a manic January transfer window if their key stars attempt to engineer moves away from the club.

Alexis Sanchez has been heavily linked with a mid-season switch to Manchester City while Mesut Ozil continues to attract attention from elite European clubs.

The contract rebels can talk to other clubs about signing on a free in the summer, meaning their values have significantly dropped in recent weeks.

But who are the most valuable players in the Arsenal squad according to a new study from CIES Football Observatory?

Take a look through the gallery to reveal how much the top five Arsenal stars are worth.