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Like many of his first team regulars, Calderwood is out of contract at the end of the season.

Calderwood has been discussing a new deal, while a Monday deadline was set for a quartet of players.

Zander Diamond, Michael Hart, Chris Clark and Barry Nicholson are all considering contract extensions.

The players are free to negotiate with other clubs and director of football Willie Miller told BBC Sport that Aberdeen had made the best offers possible.

He also revealed that Plymouth boss Paul Sturrock had made an enquiry about one of the four but had not tabled an offer.

Calderwood's future has been under scrutiny for some time.

"Nothing is certain," Calderwood told the P&J. "My own contract situation is no nearer to being resolved and we are not that far down the road.

"The situation is I am waiting for the club to get back to me.

"But it is wrong for people to jump to a conclusion where negotiations with the players and the club, and my own talks about a new contract, are linked."

The club aim to keep Calderwood at the helm and managing director Duncan Fraser said: "If Jimmy is on the verge of quitting I've not been made aware of it.

"An offer is on the table and it is now a case of whether the manager will accept it or not."

Meanwhile, Aberdeen will this week give a trial to out-of-favour De Graafschap defender Dave Bus.

And former Charlton Athletic centre-half Jonathan Kurrant has left the club after only six months by mutual consent.