Sheffield Wednesday defender Tom Lees is the latest player to be linked with a move to Sunderland.
The 25-year-old centre-back is wanted by several clubs including Premier League rivals Burnley and Championship sides Fulham and Derby County, according to the Daily Mail.
Sunderland boss David Moyes has targeted a new centre-back, right-back and striker as his priorities ahead of the new season.
Sunderland are the only club in the top flight yet to make a signing this summer with the new season less than two weeks away.
Lees, a former Leeds United trainee, played 42 games last year and scored three goals.
He has previously been linked with Norwich City and Bristol City in the past.