Celtic fan groups state opposition to Keane

Robbie Keane has been heavily linked with Celtic since resigning from his post at Budapest club Ferencvaros [Getty Images]Several Celtic supporters clubs have put their name to a statement opposing the potential appointment of Robbie Keane as manager because of the Irishman's previous role as Maccabi Tel Aviv head coach.Recent reports suggest Keane, 45, has had talks with the Scottish champions' principal shareholder Dermot Desmond.The Republic of Ireland's record goalscorer has won league title