Sunderland are in talks with Danny Higginbotham after Stoke City accepted a £2.5million offer for the defender.
The Stoke captain has been chased by the Premier League new boys for much of the summer and a fee has now been agreed between the two clubs.
Higginbotham has missed The Potters' last two games through injury and is now on his way to the North East to discuss personal terms.
Stoke confirmed an offer has been accepted after conceding defeat in their efforts to persuade Higginbotham to stay at The Britannia Stadium.
"The club can confirm that it has today reluctantly given Danny permission to speak to Sunderland in respect of a transfer," read a statement on Stoke's official website.
"We have rejected two transfer offers from Sunderland since their interest became apparent in the summer.
"It was made clear to Danny that we very much wanted him to stay and he was made two new contract offers - the last one being a new four-year contract.
"Danny has now submitted a written transfer request and has stated that he no longer feels he can be committed to the club.
"As a result of this, the club has this morning given the player permission to speak to Sunderland following receipt of a third offer from Sunderland.
"We are hugely disapponted to lose Danny, however, it is difficult to keep a player who no longer wants to play for you."
Higginbotham, who joined Stoke from Southampton 12 months ago, played alongside Sunderland boss Roy Keane at Manchester United.