Tony Mowbray is expecting to oversee a shake-up to his Celtic squad this month but warned Gary Caldwell that the Parkhead club will call the shots on his future.
Caldwell's contract is up at the end of the season and all the signs are that he will forego the opportunity to extend his current deal.
The defender has been linked with a move to Middlesbrough, managed by former Celtic boss Gordon Strachan, who was reportedly at Parkhead yesterday to see the Old Firm derby.
Yet while Mowbray acknowledged that there will be changes made to his squad, he insists they will only on his terms.
"I am in the market for quality footballers," he said. "The board are fully aware of the situation.
"There are a lot of conversations going on at the moment with various clubs, either to sell players or to buy players.
"I don't know if it was Gary Caldwell's last game in a Celtic jersey. We are all very aware of his contract situation and, if there are conversations to be had, we will have them.
"What I do know is that we will be in control of whether Gary stays or goes. He is our player, he is under contract and we will decide what is best for this football club, first and foremost."