Robin van Persie has hailed the atmosphere inside Manchester United.

Van Persie credits his success - along with the continued longevity of United's older stars - to the culture that boss Sir Alex Ferguson has created at the club.

"There is a new challenge for me every day at United," he said.

"My development is an ongoing process. That gets an extra boost when you are surrounded by new coaches and team-mates, all with their own ideas, in a totally new environment."