Manchester United boss Ferguson has already kicked off the 'mind games' with Mancini.
Benitez said: "As a manager you need to worry about your job and your team - not the mind games.
"People are talking about mind games with Man U and City. Both teams are very good teams and if City win their next match 5-0 people will say Mancini is not affected by the mind games. If they lose it's 'oh - the mind games'.
"When you have a lot of foreign players normally they don't read the newspapers so the mind games for them are nothing.
"I don't think that it's important or makes a big difference. The main thing is if you have a good team you can win all the mind games, if you don't have a good team you can't.
"I think it [the title race] will be tough until the end. City have enough quality and United have the confidence now and the experience."