Manchester United boss Sir Alex Ferguson regards Cristiano Ronaldo as his best signing of the decade.

The Sun says Ferguson has hailed Real Madrid winger Ronaldo as the most important signing of the decade for Manchester United.

The Old Trafford boss made the choice in a review of his last 10 years at the club.

Fergie said: "Ronaldo was fantastic. Just a marvellous player. All good players are hard to replace."