Ole Gunnar Solskjaer has been assured he will be given more transfer windows to complete his Manchester United overhaul.

The Norwegian saw deadline day pass without securing much-needed additions in midfield or attack after a late move for Mario Mandzukic collapsed over Juventus' £14million valuation of the veteran forward.

But Solskjaer has been given assurances he is seen as the long-term solution to United's problems, with an acceptance at board level that instant success may not be possible.

Solskjaer was handed £140m to bring in Harry Maguire, Aaron Wan-Bissaka and Daniel James in his first summer window – but the £73.7m sale of Romelu Lukaku to Inter Milan means his net spend for the summer stands at £66m.

That figure is likely to further reduce, with the club hoping to find a buyer for Matteo Darmian before the Spanish and Italian windows close in September – while Marcos Rojo is also ready to leave over concerns about his first team opportunities.

In Pictures | Man Utd's summer transfer business 11 show all In Pictures | Man Utd's summer transfer business 1/11 Man Utd's summer business Ole Gunnar Solskjaer has mostly looked to strengthen his squad with young, British players this summer. Getty Images 2/11 IN - Harry Maguire (Leicester, £80m) Manchester United via Getty Imag 3/11 IN - Aaron Wan-Bissaka (Crystal Palace, £50m) Getty Images 4/11 IN - Daniel James (Swansea, £22m) AFP/Getty Images 5/11 OUT - Ander Herrera (PSG, free) Getty Images 6/11 OUT - Romelu Lukaku (Inter Milan, £73m) Manchester United via Getty Imag 7/11 OUT - Antonio Valencia (LDU Quito, free) AFP/Getty Images 8/11 OUT - Dean Henderson (Sheffield United, loan) Manchester United via Getty Imag 9/11 OUT - James Wilson (Aberdeen, free) Getty Images 10/11 OUT - Regan Poole (MK Dons, free) Getty Images 11/11 OUT - Kieran O'Hara (Burton Albion, loan) Getty Images 1/11 Man Utd's summer business Ole Gunnar Solskjaer has mostly looked to strengthen his squad with young, British players this summer. Getty Images 2/11 IN - Harry Maguire (Leicester, £80m) Manchester United via Getty Imag 3/11 IN - Aaron Wan-Bissaka (Crystal Palace, £50m) Getty Images 4/11 IN - Daniel James (Swansea, £22m) AFP/Getty Images 5/11 OUT - Ander Herrera (PSG, free) Getty Images 6/11 OUT - Romelu Lukaku (Inter Milan, £73m) Manchester United via Getty Imag 7/11 OUT - Antonio Valencia (LDU Quito, free) AFP/Getty Images 8/11 OUT - Dean Henderson (Sheffield United, loan) Manchester United via Getty Imag 9/11 OUT - James Wilson (Aberdeen, free) Getty Images 10/11 OUT - Regan Poole (MK Dons, free) Getty Images 11/11 OUT - Kieran O'Hara (Burton Albion, loan) Getty Images

Solskjaer knows the pressure will be on to get his first full season off to a flying start – and has already voiced concern over the campaign being wrecked if his side carry on their woeful form at the end of the last term.

As such, he was hoping for a near-perfect window – aiming to bring in at least one midfielder and a top quality forward to replace Lukaku.

United balked at Newcastle's £50m valuation of Sean Longstaff, who was seen as another player who could develop at Old Trafford, and never followed up initial interest in Bruno Fernandes with a formal bid.

They made a late move for Tottenham playmaker Christian Eriksen, but quickly abandoned talks when the Dane indicated his heart was set on Spain.

Executive vice chairman Ed Woodward and owners, the Glazers, have bought into Solskjaer's vision of the future and his desire to rebuild the club around a squad largely made up of young, hungry, domestic talent.

The decision to pull out of Eriksen negotiations was confirmation of their determination to ensure new additions are fully committed to being part of Solskjaer's revolution.

For similar reasons they ended their pursuit of Paulo Dybala last weekend, with United's hierarchy doubting the Juve forward's motivation to join the club in the face of exorbitant salary demands and associated agent fees.

Even when word of a potential change of heart from the Argentine came to light in recent days, United were adamant they had no interest in resuming talks.

While there are great hopes for Scott McTominay and Mason Greenwood this season, there is an acknowledgement within the club that issues within the squad remain unresolved.

But Old Trafford's hierarchy have indicated they will show Solskjaer more patience than his predecessors David Moyes, Louis van Gaal and Jose Mourinho.

All three were sacked for missing out on the Champions League – or in Mourinho's case, looking set to miss out on Europe's premier competition.

Solskjaer has already tried to manage expectations by admitting a title challenge is highly unlikely, given the gulf between United and last season's top two Manchester City and Liverpool. And there appear to be realistic expectations regarding the challenge of breaking back into the top four.

While Solskjaer can expect patience from his superiors, disgruntled supporters are already mobilising against the club's owners on social media.

The #Glazersout movement has gathered pace, and lack of significant outlay in such a critical summer has provided more cause for complaint.

But United have stuck to the mantra of bringing the right players, not just any player – and were determined to avoid the high profile transfer errors of the past like Angel di Maria and Alexis Sanchez.

Dybala was never Solskjaer's first choice attacking option, with Jadon Sancho the target he set his sights on early in his reign.

Rather than panic buys, his preference was to put faith in young players like Greenwood and find solutions from within.

McTominay will have a pivotal role alongside Paul Pogba in midfield, with Jesse Lingard key to the high pressing game United's manager plans to implement.

Specific attention has been paid to fitness and conditioning in pre-season, which Solskjaer believes will have a transformative effect on his existing players.

He also hopes the faith he has shown in Anthony Martial – handing the Frenchman a central striking role – will finally see the France international produce on a consistent basis.

Priority target Maguire, meanwhile, is expected to be the leader the club have lacked for years.

In Pictures | Harry Maguire joins Man Utd | 05/08/2019 5 show all In Pictures | Harry Maguire joins Man Utd | 05/08/2019 1/5 Manchester United via Getty Imag 2/5 Manchester United via Getty Imag 3/5 Manchester United via Getty Imag 4/5 Manchester United via Getty Imag 5/5 Manchester United via Getty Imag 1/5 Manchester United via Getty Imag 2/5 Manchester United via Getty Imag 3/5 Manchester United via Getty Imag 4/5 Manchester United via Getty Imag 5/5 Manchester United via Getty Imag

The hope is that marked improvement on the pitch will buy time from supporters – allowing Solskjaer to embark on a measured rebuild, which will continue in further windows.