Mourinho reveals he signed as Ferguson's successor in 2013

There is a very famous football team in England called Manchester United.

In 2013, their legendary coach, Sir Alex Ferguson, retired.

The team needed a new coach.

Jose Mourinho, another famous coach, says he had already signed a promise to take that job.

But instead, he went to coach Chelsea for a while.

He kept the promise to Manchester United a secret for a long time.

Years later, in 2016, he finally became Manchester United's coach.

He stayed in that job until 2019.

Now he has told this story in a Netflix documentary called 'Mourinho.'

He says he wants people to know the truth.