Martin Odegaard, Mikel Merino plus Leandro Trossard’s suspension - The Gunners are still missing several players through injury including captain Odegaard, and Mikel Arteta will now miss forward Tross

Tomiyasu has not yet played a single minute for Arsenal this season, having suffered a knee injury in the summer. The Japanese defender has not returned to training and a recent vague update from Arteta suggests that a return is not imminent. "At the moment, it’s difficult to say," the Arsenal boss said.

Arsenal manager Mikel Arteta issued an injury update on club captain Martin Ødegaard ahead of the Gunners' Champions League tie against Atalanta. Arsenal's captain was substituted off for Norway over the international break and looked to be in severe pain.