Sunderland manager Steve Bruce says he is holding talks with Sol Campbell over a possible deal for the defender.
Campbell is available as a free agent following his release from Arsenal this summer and Bruce could swoop to capture the former England man.
The veteran has also held talks with Scottish giants Celtic over the close-season, however, a move to the Stadium of Light could now be in the making.
Bruce admitted his interest in Campbell, but stressed any thoughts of a transfer were still in their infancy.
The Black Cats chief said: "I have known Sol Campbell for a lot of years and it was nice to see him.
"We had a catch-up to see what his ideas are and what he is up to. It was pretty positive stuff and we will see what happens there."
Bruce has made known his desire to strengthen his backline in the close season and Campbell is not the only option he has lined up.
The former Wigan boss is interested in Schalke man Heiko Westermann and Ghana international John Mensah, who spent time on loan at the Wearside outfit last season.
Injury concerns may scupper any move for Westermann after a broken foot ruined his World Cup dream.
The German international had been due to take a place in Joachim Low's final party for the South Africa showpiece and the problem has complicated any move to Sunderland.
Irons in the fire
Bruce revealed a bid had been made, but no deal was at an advanced stage. He said in the Sunderland Echo: "I've a number of irons in the fire.
"The situation with Westermann was complicated because the boy got injured at the end of last season.
"But there is still interest there. We have made a bid, but that hasn't come to anything at the moment."
Mensah is another plagued by injury and his fitness problems restricted his involvement whilst on loan from Ligue 1 team Lyon.
The issues continued into Ghana's World Cup campaign and Bruce said he would not gamble on a permanent deal for the 27-year-old.
A pay-as-you-play option is being considered, though, and Bruce still remains keen to capture the highly-rated stopper.
But he may yet face competition to snare his target, with German side Hamburg and Turkish outfit Galatasaray both believed to be in the chase for the player.
He added: "As for John Mensah, we all saw what a terrific player he is when he was here last season. When he is fit, he is up there with the best I have worked with.
"He has been back here to see me this week and we will have to see how that situation develops.
"Everyone knows the issue he has with his injury and he got through the World Cup hardly training and with a physio round the clock.
"With his injury issue, I don't think I could commit this club to a permanent move for John. I would love to bring him back, but the deal would have to be right."
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