The England international is up against the likes of summer signing Robin van Persie, young gun Danny Welbeck and Mexican ace Javier Hernandez for a spot in Sir Alex Ferguson's first team but he has welcomed the challenge of getting a regular game for the Red Devils.
"There is a lot of competition up front, but that is great for the squad," said Rooney. "The manager will rotate when he feels it is necessary.
"There are a lot of games throughout the season. It means we can get a rest here and there to make sure we are ready for the big games towards the end."