Arsenal have confirmed that Kieran Tierney will be out of action for four to six weeks.
The defender injured his left knee in the Premier League loss to Liverpool and was pulled out.
Arsenal are next in Europa League action against Slavia Prague and have revealed center-back David Luiz will also be missing.
On Tierney, a statement on the club’s official website read: “Surgery will not be necessary and it is hoped that Kieran will be back in full training within four to six weeks.”
When asked if the 23-year-old, who hopes to play for Scotland this summer, will feature again this season, manager Mikel Arteta was unsure.
“We will have to go there day by day, when we are close and depending on how he feels, we will make that decision,” he said.
“He is looking forward to playing for us again this season and obviously his country in Euros.”
Luiz, meanwhile, ‘had a little surgery on his right knee’ which went well and the club say he will be available in the coming weeks.
However, fans will have to wait to see whether or not Martin Odegaard will play in the Europa League as he has suffered from ‘discomfort’ in his ankle since playing for Norway in the last international break.
Bukayo Saka, Emile Smith Rowe and Granit Xhaka are all fit to play.
But Tierney will be particularly missed given his importance in both attack and defense.
No Arsenal player has created more Premier League chances this season than the Scotland international’s 29.