Manchester City boss Manuel Pellegrini cannot rule out buying in January.
City, who face Roma early next month, still have a chance of reaching the knockout stages of the European competition following Tuesday's stunning defeat of Bayern Munich.
"It's a thing that maybe we will talk in a few weeks more," said Pellegrini. "But not in this moment. We are just focused on the Premier League, focused on the game in Rome.
"If we continue in the Champions League we will have a lot of things to think about, but you must remember we have restrictions this year - restrictions that we cannot bring in important players because we must leave them out of the squad for the Champions League.
"So we will see but I repeat that at this moment it is not the first priority to talk about. We are not thinking about that because I think it's important to trust in the squad that we have."
