The Premier League heavyweights clash at Wembley on Sunday afternoon for the right to face Wigan in the May final and the Nigerian admits that the Blues were slightly distracted in their Europa League semi-final against Rubin as a result.
"It's a game we're looking forward to and, if you look at the game against Rubin, we probably had one eye on [Sunday’s] game," he told the club's official website.
|7/4||Chelsea are 7/4 with Bet365 to score over 1.5 goals against Manchester City
City have beaten Chelsea six times since 2009 and Mikel admitted: "A few times we've been unlucky playing against them but we will be doing our best to try to change that record and turn it in our favour.
"I watched the game against United and they dominated, but we have to go into the game knowing if we keep the ball and move it around we will have our own chances.
"If you look at their team, they are a great side. When they're playing the way they are right now I don't think many teams can stop them but we're a good side as well, we have a young team and hopefully it will be a great game.
"Together as a team we just keep doing what we can and try to get into the way the manager wants us to play.
"Chelsea go into every game wanting to win. This club is not used to losing, we play every game like it's a cup final and I think [Sunday] will be the same.
"We've always welcomed the games; it's a great team and footballers like to play. [This] is the big one and we need to focus on that."