The midfielder spoke to one of his former team-mates when the two teams were drawn together in the Champions League, insisting the Catalan side are wary of their "total attack"
Manuel Pellegrini's side face the Spanish giants in the round-of-16 tie in Febuary and March and the midfielder - who played for the Catalan outfit between 2007 and 2010 - feels they are lacking in confidence.
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"After the draw I had a call from one of my old team-mates from Spain who was quite disappointed," Toure told the Manchester Evening News.
"He wasn’t sure what would happen. In the past they would be confident they would go through and beat anyone but they are afraid about us.
"The way we are playing at home and they are seeing that means they are quite scared because we play fantastic football, we score goals and it is total attack. So its going to be a tough game for them.
Before City's European commitments commence, Toure & Co. must focus on their domestic campaign, with table-toppers Liverpool the visitors in the Etihad Stadium on Boxing Day, and the Ivorian is similarly assured.
"[Liverpool] are a top team," said Toure. "We have proved we can beat the best teams at our own stadium by playing great football and scoring goals. And that is the way we must approach this game as well."