Rooney finished of the Scottish club 14 minutes from time to carry on with his hot goal scoring streak.
John O'Shea thinks there is more to come from the Red Devils he believes that every player's all round game is what separates them from the other teams.
John O'Shea told MUTV "Berba is such a talented player and he links the team so well.
"Everyone is talking about Wayne playing well at the moment but he's been doing it for a long time, it's just that maybe other players were scoring more goals."