The Black Cats have been linked with a deal to re-sign former loanee Dion Sanderson.
The defender excelled over the course of his short spell with the Black Cats under the stewardship of then-manager Lee Johnson during the 2020-21 season.
Sunderland may face competition with Championship Sheffield United also said to be interested.
Lynden Gooch, Patrick Roberts and Bailey Wright are all considering new contracts at the Stadium of Light but there has been no word on their final decisions yet.
How could Sunderland’s matchday squad potentially look given if current transfer rumours and contract talks turn out to be true?