Man Utd transfer news: Jose Mourinho inherited a squad rich with "poor signings" (Image: Getty)
That is according to former Manchester United right-back and Sky Sports pundit Gary Neville.
Mourinho has been manager of United since Louis van Gaal was sacked in 2016.
The Portuguese has spent around £400million on new signings since arriving at the club, taking the total expenditure on incomings to £700m since Sir Alex Ferguson retired in 2013.
But Neville does not think he has spent enough yet on building his squad as he is still trying to recover from Van Gaal’s errors.
The club have spent £700m since Sir Alex Ferguson retired, it’s a fortune
Gary Neville
“The club have spent £700m since Sir Alex Ferguson retired, it’s a fortune,” Neville said.
“If you’d have said to me six years ago that Manchester United were the title winners and then would spend £700m in the next few years, I would have said that they would have won multiple titles.
“It hasn’t got well, but you’ve got to remember Jose Mourinho has spent a lot of money, but the Louis van Gaal signings I have to say were really poor.
“So Jose Mourinho has had to get out of the club seven, eight, nine, 10 players, and then get them in.
Man Utd transfer news: Gary Neville believes Jose Mourinho has had to deal with poor United signings (Image: Getty)
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“He’s only been here two years, he’s not been here 15 years.
“So for me there is still more investment to place to make up for the mistakes in those first three or four seasons.
“I actually like the signings Jose Mourinho has made, they’re more along the lines of the players I’d like to see at this football club.”
Mourinho was left disappointed after the summer transfer window shut on Thursday after failing to sign a centre-back.