The Irishman has seen three bids for the 22-year-old Wigan full-back rejected by his club with manager Chris Hutchings insisting the player has told him he does not want to leave.
However, Keane said: "Just because a club says a player is not for sale - if that was the case, nobody would ever move club. I am sure Everton told Manchester United Wayne Rooney was not for sale, but they got him, so we will see."
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