Granit Xhaka will miss Arsenal's crucial match against Southampton due to an illness problem.
The Switzerland international was left out of the Gunners' matchday squad for the home clash against the Saints, due to the issue.
Arsenal boss Mikel Arteta confirmed the reason for Xhaka's absence prior to the game. He said: 'Unfortunately this morning Granit wasn't feeling very well. I am excited to see Fabio Vieira in the starting line up.
'Hopefully we have learned a lesson. We know what we have to do but we have to prove it in the moment.