Erling Haaland was replaced at half-time in the goalless draw at Borussia Dortmund because he had a fever and a knock to his foot, according to Manchester City boss Pep Guardiola.
Guardiola said “I don’t know right now” when asked if the knock is serious.
Haaland has scored a record-breaking 22 goals in his first 15 games for City.
But at Dortmund he only had 13 touches and one blocked shot in a subdued first half, before being replaced along with Joao Cancelo at the break.
“[There were] three things. I saw him so tired. Second one, he had a little bit of influenza in his body. Like Joao – Joao had a fever,” said Guardiola.
“Then the third, he had a knock in his foot. That’s why he was not able to play the second half.
“I spoke with [the medical staff] at half-time and they were a little bit concerned, but I saw him walking more or less normally. We will see.”
City sealed top spot in their Champions League group with their point in Germany.