With the winter break approaching, sporting director Ole Book and managing director Lars Ricken are expected to prioritise retaining their existing players rather than making major additions to the squad. Several important contracts will need attention, with Dortmund keen to avoid losing key members of the team.
Goalkeeper Kobel is among the highest priorities. The Switzerland international has been Dortmund's first-choice goalkeeper since arriving from VfB Stuttgart in 2021, but his current contract expires in 2028.
According to Sport Bild, Paris Saint-Germain have been making enquiries about the 28-year-old's future plans. The French club have reportedly maintained their interest in Kobel, having previously considered a move for him.
Dortmund are keen to secure an extension and reportedly hope to reach an agreement before the end of the year. Kobel is understood to be open to staying, although interest from PSG could complicate the club's efforts.
Julian Ryerson is another player Dortmund want to retain. The Norwegian right-sided defender is reportedly open to extending his contract, but he also has ambitions of experiencing football in another country.
Sport Bild reports that Ryerson has been informed that negotiations should begin in the coming weeks. His situation will therefore be another important issue for the Dortmund hierarchy as they attempt to keep their squad together.
Serhou Guirassy's future has also attracted attention over recent transfer windows. Dortmund reportedly want to offer the striker a new contract running until 2030, but his decision could depend heavily on the club's sporting ambitions.
Guirassy is understood to be willing to consider an extension, although he wants to be convinced that Dortmund can compete for major honours. Their ability to challenge for trophies across the three competitions in which they are involved could therefore influence the negotiations.
Waldemar Anton appears to be the closest of the four to agreeing a new deal, although his discussions are not yet straightforward. The Germany international's current contract also expires in 2028, and Dortmund reportedly want to extend it until 2030.
The 30-year-old is said to be interested in staying, but the initial offer from the club did not meet his financial expectations. Anton has reportedly responded with a counterproposal, meaning further negotiations over the financial terms will be required.
Dortmund have made clear their desire to keep all four players, but their situations are different. Kobel is attracting interest from abroad, Ryerson is considering his longer-term options, Guirassy wants to see evidence of the club's ambitions and Anton is seeking improved financial terms.
The coming weeks could therefore prove significant for Book and Ricken as they attempt to secure the futures of four established members of the squad.