The former Chelsea midfielder has until next Wednesday to respond to the charge.
He said: "We have an FA charge and we are working on it. I've got until next Wednesday but we have not made any decision on it yet."
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Arsene Wenger's position as Arsenal manager has come under increased scrutiny following Wednesday's Champions League thrashing at Bayern Munich.
The latest gossip and rumours from the newspapers and online:Everton boss RONALD KOEMAN is in line to replace Luis
Mesut Ozil was given the chance to prove he can make an impact in big games as he started Arsenal's
Barcelona risk an early elimination from the Champions League after losing 4-0 in the first leg of their last-16 tie with Paris St Germain.
Barcelona face a huge challenge to reach the quarter-finals of the Champions League after losing 4-0 to Paris St Germain