Manchester City boss Manuel Pellegrini is worried about their form after being eliminated from the Capital One Cup by Newcastle United.
Playmaker David Silva - surprisingly not rested along with Sergio Aguero, Vincent Kompany and Joe Hart - limped out of the action early and Yaya Toure was later withdrawn as a precaution.
Pellegrini said: "My feeling is that we are not playing well. We are in a difficult moment with a lack of trust.
"We are conceding too (many) easy goals and we are not scoring the chances we have to score. That's the feeling at this moment.
"It's a lack of confidence that we must address as soon as possible because we need to continue to be involved in the other competitions.
"Of course we must be worried - we didn't win the three games we played this week. We must be worried about that but we must find a solution and we must address it.
"We will see with the players which is the way to try and recover that confidence because it's not normal to see this team playing the way we are now."
