Our captain received prolonged treatment after receiving a kick late in the second half against Bournemouth, while the Bosnia international came off.
Unai Emery had this to say about them both after the game:
on Koscielny...
I hope all it is, is one kick. We have three days between today and Saturday and I hope he can be okay.
on Xhaka and Kolasinac...
Yes he is [Xhaka] okay, he was rested. Kolasinac has been having a problem in his muscle and sometimes he is telling us to rest some matches and some minutes.