Gabriel Jesus is set to go for more tests following a medial collateral ligament injury he suffered during Sunday’s 0-0 draw at Crystal Palace.
Jesus, 20, went off in tears after injuring a knee during the first half at Selhurst Park.
The Brazilian striker is set to undergo further tests in the coming days to determine the extent of the injury, which could see him ruled out for several months.
City said the player would “undergo further examinations to establish the extent of his lay-off”.
City manager Pep Guardiola previously said the injury would keep Jesus out for “a little more than a month”.
Playmaker Kevin de Bruyne could also be set for a spell out after he left the field on a stretcher.
However, the Belgian was seen hobbling along the touchline after the game.
“You have to admire the physicality of the Premier League, but the referees need to protect the players, that is all I ask,” Guardiola said.