Fernando's availability, going by reports on Thursday evening suggests that he still hasn't recovered from the groin pull he suffered against Stoke in Manchester City's last league fixture. (justarsenal.com)
No science behind this but to me it seems you can always count on Ramsey to be out a few weeks with a hamstring or groin pull and Ox seems available more than I would think of a 3. (justarsenal.com)