The Red Devils have failed to bring in their top targets in the summer transfer window after Manchester United were linked with a host of centre-halves.
Manchester United were thought to be keen on a deal to sign Tottenham Hotspur defender Toby Alderweireld and Leicester City’s World Cup star Harry Maguire to improve their back four.
However, the 20-time English champions have been limited to three additions in the summer transfer window to leave Jose Mourinho in a foul mood ahead of the new season.
Fred completed a £52m switch to Manchester United from Ukrainian Premier League side Shakhtar Donetsk, while Portuguese teenager Diogo Dalot finalised a £17m switch from FC Porto.
Veteran English goalkeeper Lee Grant sealed a move to Manchester United in a £1.5m deal from Stoke City to provide cover for David De Gea and Sergio Romero.
Former Arsenal playmaker Nicholas predicted that Mourinho wouldn’t last the season at Manchester United after a difficult summer.
“Manchester United fans are uncomfortable with what they’re watching,” Nicholas told Sky Sports.
“We saw the downtrodden Jose Mourinho last season and the difference was that they didn’t win anything. The transfer organisation is being passed off and it just throws you back to what he was like at the end at Chelsea.
“He looks fed up and with what has come up from the America trip I don’t see him lasting the season.”
Manchester United start the new Premier League campaign with a clash against Leicester City on Friday night.
The Red Devils haven’t won the Premier League title since 2013.
MORE: Man United latest news
MORE: Arsenal latest news
MORE: Chelsea latest news
MORE: Liverpool latest news