Reports in German media indicated that internal plans were already in place for more concrete talks with the trio, although no exact timeline had been confirmed. All three players remain under contract until 2028, meaning Dortmund are not under immediate pressure, but the club are keen to act early and avoid uncertainty.
Kobel, who has established himself as one of the Bundesliga's most reliable goalkeepers, had previously attracted interest from several top European sides. However, speculation surrounding his future had quietened in recent months, strengthening Dortmund's position heading into any negotiations.
Anton, meanwhile, had drawn attention from clubs including Manchester United, Aston Villa and Atletico Madrid. Despite that interest, Dortmund remained firm in their stance, viewing the centre-back as a key part of their defensive structure moving forward.
Discussions over a potential extension were first initiated under former sporting director Sebastian Kehl, and those talks are expected to continue under the club's current leadership.
Ryerson has also emerged as a sought-after option, with reported interest from Liverpool, Barcelona, Manchester United and Newcastle United. His versatility and consistency have made him an important asset in Dortmund's squad.
With interest growing across Europe, Dortmund's intention is clear: secure their defensive spine early and maintain stability as they plan for the seasons ahead.