Aberdeen boss Mark McGhee accepts striker Lee Miller could leave the club on a free transfer this summer if he rejects an offer to stay.
The Scotland international is a target for Scottish Premier League rivals Hearts with his contract set to expire at the end of the season.
A deal to stay at the Pittodrie Stadium is on the table but, having now entered the last six months of his contract, he is free to discuss terms with other clubs.
The Jambos, who Miller spent time on loan with in 2005, have been alerted by this and are set for an approach, but McGhee hopes the club can hang on to his services.
"We hope to keep him and have offered him a deal but there is nothing I can do if another club shows interest," he told the Daily Record.
And McGhee revealed he has a summer free transfer of his own in mind by targeting in-demand Falkirk full-back Darren Barr, but faces competition from Hibernian.
McGhee confirmed: "Hopefully we can also get Darren Barr from Falkirk."
McGhee has seen his first season in charge of the Dons plighted by inconsistency, but with his options at the back and up front set to increase, the former Wolves boss feels his team can now push on.
"With Zander Diamond and Sone Aluko coming back from injury I am close to finally getting the chance to pick my strongest team," he said.
"I have not had that luxury so far. I've often been trying to come up with a formation that suited the players I had left."