Sunday's home clash with improving Liverpool.
"We're in a good position, of course, but we're not going to get carried away," insisted Rooney.
"We need to just keep going and taking each game as it comes and see where we are with three or four games to go. That'll be the time we can really believe we're going to win it.
"You never know about tomorrow. The most important thing for us was winning today and then we'll see what happens. Hopefully, City will drop points but, if not, we'll have to just keep going."
Wayne Rooney was speaking to MUTV and ESPN.