Mourinho admits the fifth-round defeat was one of Chelsea's worst performances since he returned as manager in the summer but is not concerned.
"I don't like to lose," he said. "When I lose, instead of crying, I want the next match to come. I want to play, I want to try to have again the taste of victory.
"I'm never down with a defeat. I want to start working again for the next match and, hopefully, I can pass to them this kind of spirit, this kind of message. I think we also played very poor against Basle this season but obviously City are incomparable with Basle. They were stronger than us, so not a big story."