Arsenal boss Unai Emery is waiting to find out the extent of the injury which forced Laurent Koscielny off during the 3-0 Europa League win over BATE Borisov.
Koscielny limped off 11 minutes after half-time at the Emirates Stadium on Thursday evening, with Emery hoping that the prognosis of a possible recurrence of an Achilles problem is not too serious.
He told reporters: "I think it was a precaution, but I hope he will be okay for Sunday and for the next week. It's muscular, it's not a break.
I think it was a precaution, but I hope he will be okay for Sunday and for the next week.Unai Emery
"I think it's only a precaution because he didn't feel good and with the possibility that maybe if he carried on in the match, it could break."
Meanwhile, Emery was content with the performance of playmaker Mesut Ozil, who was handed a first start in nearly a month.
The Spaniard added: "Today he showed what he wants. I think we need every player and playing Mesut was important and positive.
"If he is available like the last two weeks, we are going to play a lot of matches and maybe sometimes we need him in the starting XI and sometimes on the bench, because we have a lot of players to also help us.
"His spirit like today is good and his quality and capacity and combination with some players is good."
The Gunners are back in action on Sunday, when they play host to Southampton in a Premier League clash, with Arsenal 11/20 to win the game and 15/2 to do so by a 2-0 scoreline.
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