Pep Guardiola fears Claudio Bravo could miss the remainder of the season after being carried off on a stretcher during Thursday's Manchester derby.
The Chilean goalkeeper was withdraw with a calf injury 11 minutes from time in Manchester City's goalless draw with neighbours United
"He has an injury, probably [out] for some weeks," said Guardiola, when quizzed about the extend of Bravo's injury.
"Seeing as though we are in the final stage of the season I don't know if he will be available again."
City dominated for large spells of the game against United but, despite Marouane Fellaini's late sending off, were unable to force a winner.