The costly failures of Angel Di Maria and Radamel Falcao convinced Louis van Gaal to build a new team — even if he will not be at Old Trafford to reap the benefits.

Despite Manchester United’s mixed start to the season, the manager insists he is developing a young side that may one day be compared to the Busby Babes or the Class of ’92.

He has invested £70 million in Memphis Depay, 21, and 19-year-old Anthony Martial and regards them as a cornerstone of a great future that will also include Luke Shaw, 20, who suffered a broken leg on Wednesday, and 20-year-old Adnan Januzaj, who is on loan at Borussia Dortmund.

Scroll down for video

Luke Shaw posted these pictures with medical staff at the St Anna Hospital in Eindhoven via instagram

The Manchester United and England left back arrived back at a Manchester hospital on Saturday

The challenge excites Van Gaal even though he is unlikely to go back on a promise to wife, Truus, to quit the game when his contract ends in 2017.

‘I believe I have a very good eye for young talent. I am a trainer-coach who believes in youth,’ said the Dutchman.

‘When you see my career, you can see a lot of youngsters come through and when I’m not there, you have the guards of the club culture.’

Memphis Depay has scored three goals in eight appearances since joining from PSV Eindhoven

As he prepared for Sunday’s trip to Southampton, Van Gaal’s message to his doubters was to look at his record of creating new dynasties.

‘At Barcelona, Xavi captain, Iniesta captain, Valdes captain. For 10 years they were the backbone of the club and the culture. At Bayern Munich, it was the same with Muller, Alaba, Badstuber,’ he said of the players he blooded.

‘Maybe when I am gone, Shaw shall be the guard of the culture. Or Januzaj. Or Martial, but first he has to speak the language!’

United have invested £70 million in Memphis Depay, 21, and 19-year-old Anthony Martial

United sold Di Maria to Paris Saint-Germain at a loss of £15 m 12 months after making him a record buy at £59.7 m. They spent £25 m on a loan fees and wages for Monaco star Falcao who scored just four goals.

It led to a dramatic U-turn in transfer policy in order to concentrate on young talent. They spent £31 m on Depay and completed a £36 m deal that could rise to £58 m for Martial.

‘I believe in that kind of culture. That is more or less an argument to come here,’ he said. ‘It is important to educate young players in the club’s culture.

Louis van Gaal insists he is developing a young side that may one day be compared to the Class of ’92

But Van Gaal is unlikely to see his groundwork come to fruition. He said: ‘It will be difficult [to see the team peak] because I would have to stay and you know what I’ve said [to Truus], and I always do what I say.’

Shaw, meanwhile, has received a hospital visit from the man who broke his leg.

A challenge from PSV Eindhoven’s Hector Moreno during Tuesday’s Champions League tie left Shaw with a double leg fracture. Moreno and PSV coach Phillip Cocu visited him at the St Anna Ziekenhuis hospital in Geldorp on Friday. Cocu said: ‘Hector is really distressed his opponent was so badly hurt. We first asked whether Shaw would meet us, which he wanted to.