Former Manchester United player Roy Keane has said he thinks David Moyes should have been given more time.
Speaking to ITV Sport, he said: "He certainly had a hard start when he took the job. I think the chief executive didn't get the deals done that he wanted. There was a lot of negativity. He had a slow start and no momentum.
"I think it is a shame, I think he should have been given more time. I think some of the players at Man United should be ashamed of themselves, I think they have really let him down."
The Commitments author Roddy Doyle has signed a deal to work with Roy Keane to write the footballer's autobiography.
The book, called The Second Half, will be published in the autumn and is described as a blend of "memoir and motivational writing in a manner which both disquiets and reassures in Roy Keane's own original voice".
Dublin-born Doyle said: "Ten years ago I was buying something in a shop in New York and I handed my credit card to the young African man behind the counter. He read Bank of Ireland on the card, looked at me and said: 'Ireland - Roy Keane.' I'm delighted to be writing this book with Roy."
The former Manchester United midfielder said: "I am very happy to be working with Roddy Doyle on this book, and look forward to the experience."