Sources: Martin O'Neill has clear Celtic priority as January transfer plan revealed

Celtic manager Martin O'Neill wants to strengthen the squad in January rather than sell key players like Mika Baur, who has impressed since his £4.5m summer arrival.

Martin O'Neill is prioritising squad reinforcement in the January transfer window, sources have told Football Insider. The, former Celtic manager hopes to resist any temptation to sell players, particularly 22-year-old Mika Baur, who has become a key player since joining for £4.5 million in the summer and recently made his senior debut for Germany.

Celtic's summer window was mixed, with some signings impressing while others struggled. The club missed out on several targets and filled gaps with loan players who have not been given sufficient opportunities. O'Neill believes January must be used to correct those mistakes and show ambition.

When interim manager last season, O'Neill was vocal about his transfer demands, saying he would want around 56 players if the board listened to him. As permanent manager this season, it remains to be seen if he will express the same enthusiasm, though he will be aware that such demands carry significant weight given fan pressure on the Celtic board.