"The Club has backed Robbie 100 per cent with his appeal and we are disappointed with the verdict.
"The justification for upholding the referee's decision makes no sense to us, and if Robbie had been given an opportunity to attend - the current rules do not give him any opportunity to attend at the hearing of his appeal - we believe that the verdict would have been different.
"It is frustrating for Robbie that he is now forced to miss three games whilst players who committed similar, or in many cases, worse, tackles at the weekend are free to play.
"We shall be writing to the FA to express our concerns."
John Alexander, the Club Secretary, has responded to the FA decision to uphold Robbie Keane's three match ban.