The attention starved United legend also claimed that Mother Teresa was a selfish atheist who “fucked people out of money”.
In the book, he said: “Ali was all talk and no action. A proper athlete would have kept fighting, despite the crippling effects of Parkinson’s disease.
“Also, Mother Theresa looked like she had been spat out of a washing machine. I could never understand what the old bitch was saying and for that reason, I was glad when she died.”
A source close to Ferguson has revealed that the managerial legend is being deliberately contrary and controversial in order to sell more books.
The source said: “Alex loves money more than anything, and is willing to raise hell in pursuit of it.
“He wanted to do a whole chapter about how the Dalai Lama was a shite bag, but the ghost writer wisely suggested Muhammad Ali as an alternative, simply because his severe medical condition has rendered him incapable of fighting back.
“The same applies to Mother Theresa. There isn’t much she can do now, and Alex liked that.”