Graeme Souness believes that Ole Gunnar Solskjaer has a "monster job" ahead of him to turn Manchester United once again into a Premier League and Champions League winning side.
Speaking on Virgin Media Sport's Champions League coverage on Wednesday, Souness said that the main failing at the club over recent seasons has been their work in the transfer market.
"They're not going to do it with one transfer window," said Souness.
When they sacked Mourinho, I felt they had to give it to someone with a link to their past - they've gone and done that. We'll have to wait and see if Ole is the right man for the job.
With the previous two managers, they've not bought well. If you make a direct comparison with what Liverpool have done in the last ten transfer windows they've done some marvellous business.
It would appear that Man United have not bought well in the last four to five years and they are paying the price for it now. There's no quick fix at United. It's a long job.
They'll be fighting to get into the Champions League this year where the real dosh is and to be attractive to the big players. You've got to be in the Champions League for your club to go forward.
"You can't keep spending £200 - £300 million every transfer window," continued Souness.
"What have they got to show for it today? Who can you say - from the team that played Barcelona - are going to be the main men in that team for the next five years?
"Would you put your house on Pogba? I certainly wouldn't. People expect me to say that. Then you think of Sanchez coming on. Well, he'll be going out the door. Rashford is up and coming. Is he the real deal? We'll have to wait and see. Lingard, I'm not sure about.
"The goalkeeper, all of a sudden, is looking vulnerable. Both guys who played at fullback, no. The centre-backs, no, with the caveat that, maybe, Lindelof.
"People will think that I'm coming at it from being anti-United, not in the slightest, I'm a football person and I know Ole has a monster job on there - there is no quick fix to that.
"Right now, what you are looking at, unless they have a stream coming through the youth system, they're looking like they'll have to go big, big, big in the next four or five transfer windows."
"People think I'm anti-Man. United, not in the slightest, I'm a football person!"
Graeme Souness discusses at length the job #MUFC have on their hands to return to the top. #VMSport #UCL pic.twitter.com/eL4u5wfisH
— Virgin Media Sport (@VMSportIE) April 17, 2019
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