Manchester City boss Manuel Pellegrini says striker Sergio Aguero will be ruled out for at least four weeks.
Speaking during his press conference ahead of the Roma game, the Chilean confirmed that the striker will of course miss tomorrow's game and that he will not be back before the end of January.
Vincent Kompany, David Silva and Stevan Jovetic are in the squad to face the Giallorossi.
The Citizens will make it through the group stage if they beat Roma and CSKA Moscow fail to beat Bayern Munich.
Pellegrini described Rudi Garcia's team as very strong, not just in the offensive department as he highlighted possession and converting chances in front of goal as two important factors of the game.
