City face rivals United at Eastlands this weekend.
“United need the points to catch Chelsea and they know Arsenal are behind them,” De Jong told the Manchester Evening News.
“They have to secure their place in the top two. We need those points, even though Liverpool drew.
“But it’s a derby and there is always more at stake. It would be nice to damage United’s title chances but we have to focus on our own goal. Anything else is extra from our point of view.”
