The Black Cats will be looking to strengthen their squad by making new signings in the coming weeks, yet there could also be departures at the Stadium of Light.
Ellis Simms has already been recalled from his loan spell by Everton, leaving Sunderland short of options up front.
Some players are also attracting interest from other clubs, while some fringe players may be allowed to leave on loan.
We’ve taken a closer look at every Sunderland player's situation:
5. Dennis Cirkin
Following his impressive start to the season, there were reports that Tottenham were interested in re-signing the 22-year-old left-back. Brentford were also credited with interest, yet Sunderland will be keen to keep the defender and extend his contract, which is set to expire in 2024. Photo: Frank Reid
6. Daniel Ballard
Sunderland beat Championship opposition to sign the defender for a seven-figure fee in the summer, with Ballard agreeing a three-year contract. After a lengthy injury setback, the 23-year-old is keen to establish himself as a regular starter. Photo: Frank Reid
7. Danny Batth
Batth is one of a handful of Sunderland players whose contract is set to expire this summer. The Black Cats hierarchy will therefore have to decide whether to offer the 32-year-old a new deal, given the centre-back has been a key player in the first half of the campaign. Photo: Frank Reid
8. Lynden Gooch
Despite interest from elsewhere, Gooch decided to stay at Sunderland in the summer, signing a two-year contract extension with the club. Photo: Frank Reid