His departure comes only 77 days after being appointed to his first job back in management since last season being sacked by Inter Milan in 85, but despite serving so little of his three-year contract, Mourinho believes it has become near-routine.
“I was sacked (by Chelsea) as a champion, (former Leicester manager Claudio) Ranieri was sacked as a champion,” said the Portuguese, also once of Inter.
“Frank de Boer is sacked after four matches and next season something incredible again, so nothing surprises me. That’s the world where we are.
“That’s the world where many of you enjoy and also contribute to the kind of pressure that managers are involved.
“But in football nothing surprises me. Nothing surprises me.”