The midfielder explains that there is also a determination to make up for a failure to secure successive Premiership wins at Blackburn on Saturday.
"There is great anticipation and we just want to get a win under our belt after losing at Blackburn," insisted Rohan. "We wanted to get back-to-back wins but, unfortunately, we didn't so we are looking to get back to winning ways.
"We've got to be on a guard like you have against every team and show 100% commitment, workrate and make sure we show our abilities.
"I am in a confident mood and hopefully I can show that by influencing the game against City."
An obvious threat in the City ranks is striker Nicolas Anelka, a player Rohan knows from his younger days at Arsenal. While an admirer of the Frenchman, Rohan points out that we have an in-form player to counter his advances on our goal.
"I know Anelka, he is quick and a potent force - but we've got Anthony Gardner, who is just as quick."
Rohan Ricketts says there is great anticipation in the camp ahead of the Carling Cup clash with Manchester City at the Lane tonight.