Manchester United manager Sir Alex Ferguson insists he is not prepared to buy in the January transfer window unless a top player becomes available.
Ferguson, 69, has seen his squad beset by injuries, with winger Ashley Young the latest casualty.
But Ferguson said: "I am perfectly happy with the strength of our squad in terms of depth, quality and age range.
"I will not be swayed by endless tweets and blogs urging the club to get busy in the transfer market next month."
Although Phil Jones is set to be fit for the Boxing Day clash with Wigan, Young (knee) is on an injury list that includes the likes of Nemanja Vidic, Anderson, Michael Owen and Tom Cleverley, while Darren Fletcher is also sidelined with a bowel condition.
United have made forays into the January market before - most notably signing Louis Saha, Vidic and Patrice Evra - but Ferguson is confident his squad can cope.
Writing in his programme notes for the Wigan game, Ferguson said: "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."