The out-of-contract stars Sunderland AFC may be eyeing for a summer transfer deal

While the season is still in full swings, clubs will undoubtedly be busy planning their summer transfer business.

Sunderland AFC may already be eyeing some summer swoops
Sunderland AFC may already be eyeing some summer swoops

And although a large part of Sunderland AFC's business will depend on which division they find themselves in come the end of the current campaign, manager Jack Ross may well be looking ahead at potential transfer targets for the summer window. With the free agent market having proved successful last year - when the likes of Jon McLaughlin and Reece James moved on free transfers - we take a look at players whose contracts are set to expire this summer who could be of interest to the Black Cats. Scroll down and click through the pages to look at some of the players who may be available:

The centre back was the subject of a host of transfer speculation last summer, with Rangers and Ipswich among those thought to be keen. He could provide some extra cover at the back.
Formerly of Middlesbrough and Manchester United, de Laet has spent this season on loan at Melbourne City. His versatility and Championship experience may prove attractive to the Black Cats if they earned promotion.
Now, this some be some deal. The talented teenager has caught the eye of Brighton and Tottenham and, with his deal up in the summer, he will have no shortage of admirers. Could Sunderland be one of them?
While the full-back has suffered his fair share of injury troubles in recent years, his has bags of ability and would perhaps add some depth in a position where Sunderland are lacking it.
The experienced schemer was tentatively linked with the Black Cats in January, but is thought to have several clubs interested in his services.
Another player who has struggled with injuries in the past, but could be a fine addition if his best form is coaxed out. His ability would certainly make him a good signing at Championship level.
The Northern Irish international hasn't seen much game time at Bramall Lane this campaign, but could be viewed as a potential signing - if for nothing else but some attacking depth.
Currently on loan at QPR, the striker would likely only be a viable option were Sunderland promoted to the second tier. He's a goalscorer, though, and would add some extra attacking edge.
Thought to be a target for Jack Ross last summer, the striker is out of contract at Old Trafford at the end of this campaign. Could that interest be reignited ahead of next season?
Stewart was linked with the Black Cats during the winter window and the versatile forward will have a host of admirers north and south of the border when his contract expires.
Ipswich are keen to retain their skipper but, with the Tractor Boys at risk of relegation, the experienced centre back may be willing to make a move.
With bags of Championship experience, the left-back could prove a good signing and provide some competition at the back should the Black Cats wish to strengthen that area.
While a stopper probably isn't a top priority given Jon McLaughlin's form, a Stadium of Light return for Westwood could provide some excellent competition.