Mikel Arteta has had a week to forget as Arsenal boss with a couple of players now potentially facing a spell on the sidelines. Arsenal have had the worst of luck during the international break. Riccardo Calafiori’s injury is believed not to be serious but we await an official update on his situation ahead of the North London derby. Meanwhile, Martin Odegaard’s injury could see him spend an extended spell on the sidelines with the Tottenham clash definitely coming too soon after he was spotted on crutches. Mikel Arteta now has a big decision to make with Kai Havertz and Jorginho possibly comin…