Birmingham City boss Steve Bruce has warned any potential suitors that it will take 'an awful lot of money' to prise Matthew Upson away from St Andrew's in the January transfer window.
The former England centre-half returned to action after nine months out with an Achilles injury in the Blues' victory at Burnley last weekend.
Upson is out of contract in 18 months time, but Bruce has warned any interested parties keen to land the former Arsenal stopper in the New Year that he won't come cheap.
"Anyone who tries to buy anyone off us has got to pay top dollar because they know, with the owners' wealth, they can't have us over a barrel," he said.
"It is always a great weapon I have got. If anyone wants to come and buy Matty, or any of our best players, they have got to pay top money.
"I am under no pressure to sell Upson, and he is a huge valuable asset to the club.
"I wouldn't put any figure on him. But he has seven or eight England caps and he is coming to his peak at the age of 27-28. It would have to take an awful lot of money to sell him in January."