Charlton boss Alan Pardew admits the injury suffered by striker Darren Bent could force him to listen to offers for the England international.
Bent has attracted plenty of interest from other Premiership clubs
Bent, 22, is sidelined with a knee problem that could keep him out of action until mid-February.
He said: "There has been some interest in Darren. A short time ago, my decision would have been to say quite categorically he wasn't going anywhere.
"But his knee injury has made me think a bit differently."
Bent is one of the most highly-prized assets in the top flight, having scored 22 goals in his first Premiership season last year.
He has added another 11 this term, despite Charlton struggling at the bottom end of the table.
A host of clubs including West Ham, Aston Villa and Tottenham have been linked with moves for the striker.
And Pardew added: "I have to look at his fitness every day and see whether it is improving or whether he is going to be out for long time. In our situation, that might be too much.
"If someone is going to go for him in this window, they will have to wait six weeks before they can play him. They might be in the position to do that but I might not be."