I HAVE seen many reasons why Jose Mourinho was sacked as Manchester United manager on Tuesday morning, but in the end it was very simple.

It all comes down to the fact his position had become untenable as United lost patience in their failing coach.

When you are manager of one of the country's biggest teams, and spend around £400 million on players, owners expect results. And Mourinho wasn't getting them.

A football manager, like a manager in any walk of life, is expected to prove at the very least things are on the up and moving in the right direction. Had Mourinho shown he was giving youth a chance and attempting to build something like his bitter rival at Manchester City, Pep Guardiola, has done, the Portuguese may have been able to make an argument to stay.

It is not exactly a surprise this came to a head this season, as Mourinho's third season syndrome took its usual route. The usual success, including trophies in the early years, before cracks appear in the third year and he loses the dressing room.

It happened at Chelsea, twice, Real Madrid and now United, and is too much of coincidence to be dismissed.

But how does his team of winners turn into a timid group of players, and part of a toxic dressing room so fast?

No one really knows unless they have played under him but my guess is his outdated tactics, including making his team out to be the constant victim to an external enemy, can inspire in a short burst but always eventually backfire.

Once players lose faith in the plan they lose faith in the man, team spirit is shattered, and his teams fall apart.

Team spirit creates winners at any level of football and in any sport. When Mourinho's tactics were working, he always gets his team to perform better than the sum of its parts.

But once players turn on him for a variety of reasons, believing for example they should be played in another position or ahead of someone else, they are not 'buying-in' and the system rapidly crumbles.

Mourinho of course will console himself with a ridiculous payout rumoured to be more than £20 million.

And he no doubt will be back, when another owner - hoping for instant success and with no planning for the future - gives him a go.