Celtic are reportedly open to allowing a 28-year-old midfielder to depart during the January transfer window, with the final decision resting with manager O'Neill.
The Scottish club's willingness to consider an exit for the unnamed player has sparked debate over whether the midfielder's departure would benefit the squad's long-term plans.
O'Neill, who has overseen the team's recent campaigns, must weigh the player's current role against potential reinforcements in the winter market.
