The Red Devils have had a disappointing transfer window, with Jose Mourinho signing Fred, Diogo Dalot and Lee Grant.
Mourinho has cut a frustrated figure during United’s pre-season, with the Special One insisting the Red Devils need two more signings.
And BT Sport pundit McManaman reckons Mourinho’s men will miss out on the top four this season, along with Chelsea.
When asked for his top four prediction, McManaman said: “Manchester City, Liverpool, Tottenham, Arsenal.”
He added: “Manchester City were so dominant so you wonder whether they can carry on going.