The England international has recently been strongly linked with a move to Old Trafford.
“Do you really think Chelsea would sell to United in January?” Ferguson asked during his press conference on Friday.
“There’s no foundation in that. Chelsea want to do something in the second half of the season so they want to keep their best players.”
“What can you get in January?” the boss continued. “The players we’d like, we can’t get. If the alternative is to sign a second-rate player, we don’t want to do that.
“Our injuries have led to fans wanting us to sign someone but I don’t want to sign a player who won’t get a game when everyone’s fit because he’s not good enough.”