The 30‑year-old centre‑back initially got injured in a calf‑muscle problem during a pre‑season friendly in August.
Though he recovered enough to return to some action, the fresh toe issue has proved harder to shake off, enough that reports claim the swelling became so bad he "couldn't even fit his foot into his shoe".
Sule's limited involvement this season has underlined how injuries continue to derail his time at the club.
With only a handful of appearances under his belt in 2025, the recurring setbacks have only increased speculation about his future at Dortmund, especially as his contract runs down.
Coach Niko Kovac has acknowledged that while Sule is making progress in rehabilitation, the defender still "has some catching up to do," leaving no guarantee he will return before the end of the year.
VfB Stuttgart have been dealt another major setback after defender Dan-Axel Zagadou suffered a fresh muscle injury during training ahead of their Europa League match against Go Ahead Eagles tonight at De Adelaarshorst stadium.
Winger Luis Diaz starred as Bayern Munich maintained their unbeaten start to the Bundesliga season with a 3-1 win over St Pauli at the Allianz Arena.
Bayern Munich's board have moved to shut down any doubts around Vincent Kompany's future, with Max Eberl insisting that the Belgian is already proving himself as a long-term leader at the club.
Harry Kane's future moved back into the spotlight after Bayern Munich fell 3-1 to Arsenal in the Champions League league phase on Wednesday night, with the England captain unable to add to his impressive scoring record.
