Mesut Ozil could miss out on Arsenal's crunch match against Liverpool after the playmaker was a conspicuous absentee when the squad landed on Merseyside.
The former Germany international has been in and out of the Gunners team during a tough start to the 2018-19 season.
And he suffered another setback when he was substituted at half time in Wednesday's 1-1 draw against Brighton.
Now, Ozil runs the risk of being left out of the Arsenal squad altogether when they take on the table-topping Reds at Anfield.
The playmaker was nowhere to be seen on Friday when Unai Emery and the rest of the Arsenal side filed off the coach after arriving in Liverpool.