Sunderland manager Martin O'Neill has confirmed defender Kieran Richardson is set to leave the Stadium of Light after the Black Cats accepted a bid for the left-back.
O'Neill, speaking after his side's 2-0 League Cup second round win over Morecambe on Tuesday, did not disclose which club had made the offer for Richardson, but it has been widely reported that Fulham are leading the chase to sign the former Manchester United player.
Richardson was not included in the squad for the Morecambe tie and O'Neill said: "A club has made an offer for him today and we have accepted that.
"It gives Kieran the opportunity to find out for himself. If it doesn't materialise and he comes back, I'll still be pleased, but it's a position we might have to go and have a look at.
"Kieran wanted to pursue this and have a look at this. I will see what comes of it."
Richardson, 27, is in the final year of his contract and O'Neill has already been linked with a series of replacements for the former England international.
"It is something, if Kieran does go, that we would have to look at," O'Neill added.