Overview
- The 18-year-old Konstantinos Karetsas twisted his ankle after eight minutes on the pitch as a substitute in Borussia Dortmund’s goalless draw at Union Berlin on Saturday and was substituted.
- Dortmund have not confirmed the injury’s severity and the club said medical examinations are needed to establish whether he will miss further matches.
- Karetsas returned only recently after collapsing with circulatory problems during Dortmund’s Champions League win over Villarreal in early September and has since made limited appearances.
- Head coach Niko Kovac has urged caution, saying Karetsas is not yet back to his previous level and that the earlier medical episode may still affect him mentally.
- A extended absence would deepen Dortmund’s attacking shortage after summer signing Giannis Konstantelias suffered an ACL tear, a setback that prompted the club to bring in loan cover like Ethan Nwaneri.