Asked if one of the strikers held seniority over the other, Rooney said: "No. I have seen things said over the summer, but Robin and me are friends off the pitch.
"There is no problem between me and Robin at all. We are great friends and we want to help each other and be successful.
"The manager has made it clear that he wants one up and one behind and, whatever way round that is, it doesn't matter to me as long as one is always filling in behind and helping out the midfield.
"We have done the work together and the times we played together last season we did well so, hopefully, we can play more together this season and do well."