Speaking to the BBC, Schmeichel said: "On Sunday, De Gea played exceptionally well and was trying to bring some sort of stability to their defence with the way he controlled his six-yard box and came for crosses.
"But, whoever is in Van Gaal's defence, he does not seem to have enough commanding players who can stand on their own two feet.
"He needs a centre-half who can take the team by the scruff of the neck and say 'this is what we need to do'. That player is not in their squad yet.
"In my time at United, we always had defenders who were leaders and who took responsibility. For various reasons, that is not the case at the moment.
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