The Gunners star suffered the injury in the midweek Champions League play-off win over Fenerbahce.
“His hamstring is much more damaged than we thought at the start,” Arsenal boss Arsene Wenger said.
“It is very disappointing and we have paid a very heavy price for that win. We have to be patient now.”
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Being an amiable guy is good for you and Jurgen Klopp is living proof.
Summer 2016 is set to be a very exciting time for football fans, as this is when the long awaited Euro 2016 tournament kicks off.