Carlos Queiroz has accused the club of "panic buying" and said there is a lack of star quality at Old Trafford.

Queiroz, who had two spells as assistant to Sir Alex Ferguson, said he believed both David Moyes and current manager Louis van Gaal had made mistakes as United adapted to life without Ferguson.

"A club like Manchester, with its financial capabilities, the results must be there immediately.

"But we also want to see the players shining. Great players like [George] Best, [Paul] Scholes, [Ryan] Giggs, [Roy] Keane, [Ruud] Van Nistelrooy -- where are they? Where are the stars of Manchester United?

"It was always about creating players. Now it is the opposite. And even some of the players that arrived in the team like [Radamel] Falcao and [Angel] Di Maria were on the bench. I saw Di Maria in some games, and he looked like he has never played football.

"There is panic buying. You have to prepare and then make the decisions together. You can still make wrong decisions, but we never made panic decisions when buying players."