The United boss said: "Those three are good players and if any manager comes in he'll want to keep them, because they are their three best players.
"I don't see how they can possibly change that. When the new man comes in, he'll have his own philosophy.
"Most managers come into a situation where a manager has been sacked. But that's not the case with Chelsea.
"Benitez is interim manager until a new man comes in, but anyone would be silly to get rid of those three players."