Sir Alex Ferguson has revealed that he has no plans to add to his Manchester United squad during the January transfer window.

The United boss is currently unable to call upon a number of players due to injury.

Despite a depleted squad, the 69-year-old has insisted that he is happy with the options available to him.

"All things being equal I am perfectly happy with the strength of our squad in terms of depth, quality and age range," Ferguson wrote in his programme notes for the Boxing Day match with Wigan Athletic. "I will not be swayed by the endless tweets and blogs urging the club to get busy in the transfer market next month.

"As far as I am concerned I am marching perfectly in step, true to my beliefs and principles. While recruiting some of the world's leading players can lift you into contention for honours, it doesn't necessarily take you all the way, as I hope we will be able to demonstrate before the end of the season as other factors come into play.

"You can never say never in football, of course, because fortunes can fluctuate wildly - that's the football world. If a really top-class player became available, then we would go for him, or if we picked up any further serious injuries, it might be important to add to our squad."

United currently trail Manchester City by two points at the top of the Premier League table.