Martin O'Neill is expecting a lot of interest in Stephane Sessegnon after admitting the player's homesickness has become a serious issue.
The Benin international joined the Black Cats from Paris St Germain in January 2011 and has caught the eye with a series of impressive performances this season.
O'Neill is desperate to keep hold of the 27-year-old but accepts that a number of other clubs are likely to be monitoring his situation.
Sessegnon, who is banned for Saturday's FA Cup quarter-final against Everton, has been allowed to spend time with his family during his suspension.
He has found it difficult to settle in England but O'Neill is ready to do everything he can to sort out the problem, with Sessegnon under contract at the Stadium of Light for two more years.
"We wouldn't want to lose Sessegnon because of homesickness," said the manager.
"His family concerns are something we really have to look at now.
"We have someone at the club who's in constant touch with Sess and we will do everything we can.
"He is going to attract an awful lot of attention from big clubs."