Manchester City Captain, Vincent Kompany, may be sidelined for about a month after suffering recurring calf problem on Tuesday.
City Manager, Manuel Pellegrini, gave the hint at the end of the team’s Champions League encounter with Dynamo Kiev, which ended goalless at home.
The result of the match advanced City to quarter-finals of the match, qualifying on 3-1 aggregate.
Kompany was forced off in the fifth minute of the game.
Pellegrini said: “Vincent again has a muscle injury in his calf.
“We’ll know tomorrow or maybe the day after tomorrow, how bad it is but always, a muscle injury is a minimum of one month out.”
Belgium central defender, Kompany, who only returned from a calf problem in February having been out since December, will have to miss Sunday’s home Premier League derby against Manchester United.
“This is difficult for him because he came back very well and played six games in a row,” Pellegrini said.
City kept it tight on Tuesday night, refusing to gamble with their healthy 3-1 first-leg victory.
“We didn’t take any risks,” the manager said, adding: “For our team, it was important to keep the ball and not allow them to create chances.
“They knew before the game that they had to score three goals and that’s not easy.
“We didn’t have too many chances because we didn’t force the game.
“We normally are a team that always scores.
“We’ve received a lot of criticism that we never keep clean sheets but we’ve kept a clean sheet for the last three games.”