Werner had to be substituted in the defeat to the Turkish side and then missed out altogether Köln in the Bundesliga at the weekend after the feelings of dizziness returned.
Now, the 21-year-old, who has scored six goals in eight senior internationals to date, is a doubt for Germany’s final two World Cup qualifiers against Northern Ireland and Azerbaijan.
“It does not make sense to send him to the national team as long as the diagnoses are not finished,” Leipzig sporting director Ralf Rangnick is quoted as saying by German outlet Kicker.
“Of course we are concerned,” he added.
National team coach Joachim Low is apparently aware of the situation after speaking with Leipzig coach Ralph Hasenhüttl.
“I’ve talked to [Low] about it, we just need to see Timo get well again,” Hasenhüttl said.
“He’s under control and is being checked over, and we don’t know if he’ll go to the national team.”
Despite Leipzig’s struggles in the Champions League, Werner has started the domestic league campaign in fine form, scoring five goals in his six appearances so far. Only superstar pair Robert Lewandowski and Pierre-Emerick Aubameyang (both eight) have scored more.
If Werner isn’t deemed well enough to link up with the German national team, Leipzig will be desperate to see him back in time for the huge Bundesliga clash away at leaders Borussia Dortmund after the international break on 14th October.