United’s poor form under new manager David Moyes has been well-documented, with the defending champions currently in seventh place and 18 points behind leaders Chelsea.
He deserves to retire. He deserves to enjoy his life
Sir Alex Ferguson
However, Mourinho cannot understand why some fans have pointed the finger of blame at Ferguson.
“Lots of people are speaking about Sir Alex. He made Man United what Man United are,” said Mourinho.
“He decided to retire. When somebody decides to retire, especially a person like him, he deserves to retire. He deserves to enjoy his life.
“And now he’s responsible for what? Man United lose a match it’s his responsibility? Man United struggling in the Premier League is his problem?
“[Wayne] Rooney misses a goal, it’s his fault? Or [David] de Gea makes a mistake and it’s his fault?
“He can only be blamed for one thing: Man United being the club Man United are. He’s retired. Let him retire in peace.”
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