Robbie Keane has emerged as the frontrunner to take the Celtic helm this summer as the club prepares for a major overhaul. Following Martin O'Neill's interim stint, the Tottenham and Republic of Ireland cult hero is seen as the perfect figure to lead a new era at Parkhead. Keane's stock is currently high after he successfully guided Ferencvaros to the Hungarian title last season and previously enjoyed trophy success with Maccabi Tel Aviv. According to The Guardian, decision-makers at Celtic believe Keane would be open ... [2763 chars]