Tesco has launched an investigation after one of its stores started selling copies of Roy Keane's autobiography three days early.
The former Manchester United captain's book, which contains details of a drink-fuelled fight with ex-United goalkeeper Peter Schmeichel, is due for official release on Thursday.
It was put out on the shelves of the Burnage store in Manchester this morning.
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Titled The Second Half, it was co-written by author Roddy Doyle.