O'Neill not sure he has 'energy' for long Celtic stay

The 73-year-old is back at the Glasgow club for a third time following the departure of Frenchman Wilfried Nancy, who was dismissed following six defeats in his eight games in charge. O'Neill took charge on an interim basis after Brendan Rodgers' exit in October, winning seven out of eight matches. Nancy took charge early last month but his reign quickly turned sour. Former Aston Villa and Ireland boss O'Neill will again be at the helm until the end of the season but he is unsure about a longer-term stay.