The Brazil international said: "There is nothing missing at City. It is a great club and is working to get better in the Champions League. You can see us progressing on a monthly basis.
"The club is growing all the time, and sooner or later City will win the Champions League because everyone is working for that.
"The big difference is that here you have to play in the Premier League as well as trying to do well in the Champions League. It is a very different competition.
"They are great players here, but they need more experience of the Champions League.
"You have to tune in to playing in Europe, as it is very different to playing in your home league."