Vieira sidelined for two weeks as injury flares again after Kiev outing
The influential Frenchman made his first appearance for almost a month on Tuesday night albeit a 30-minute run-out as a substitute in the Gunners' 2-1 defeat in Ukraine which has left their Champions League campaign in disarray.
But he is now facing up to a further lay-off of "at least two more weeks" after the problem sustained against Newcastle on September 26 flared up again.
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