The 27-year-old picked up a knee injury in the Gunners´ FA Cup victory over Newcastle in January and has not played since.
Doctor Petr Krejci told Czech newspaper Sport: "It is possible that the problem could fade away in two weeks, but it could also last for another three months."
Copyright (c) PA Sport 2008, All Rights Reserved.
Do YOU want to write for GiveMeSport? Get started today by signing-up and submitting an article HERE: https://www.givemesport.com/writeforgms