United dropped to third place after the 0-0 draw.
Speaking on BT Sport, he said: “Where is the Paul Pogba we saw at Juventus? He was all over the pitch, he was battling, he was tackling, he was sprinting to people, he was scoring goals from 25 yards out.
“He is just strolling through games."
Scholes added: “Pogba doesn't look fit. I wonder whether he is training properly.
“He does not look like a player who will win you games and that is what you pay £90m for.
“No-one in England should be getting near him, but he is being asked to do a role he is not comfortable in.
“You have to say the manager has to take responsibility for that.
“Is the manager sending them out not playing the way they want to play? I don't know."