United sit atop of the standings by a clear 12 points.
But Rooney told United Review: "[With the 12-point lead] you just want to either maintain it or try and extend it by keeping on winning. You never look at the situation and say 'we're this many points clear so we can afford to lose a game and draw one or two.' It's about winning and making sure you don't drop any points. That's always been the mentality here and our approach is always to win."