Bayern Munich attacking midfielder James Rodriguez did not know the score at half-time of their defeat to Borussia Monchengladbach, according to Jupp Heynckes, and will miss training for the next few days after suffering a concussion.
The Colombia international sustained the head injury as Bayern were beaten 2-1, their lead at the top of the Bundesliga cut to three points with RB Leipzig defeating Werder Bremen 2-0.
James, who collided with Tony Jantschke, was replaced by Marco Friedl at the break.
Heynckes said after the game: "He didn't even know the score at half-time. But we have to wait for the diagnosis of the doctors.