The Mirror says United supremo Ed Woodward has sent Chelsea a â€˜terseâ€™ letter warning them to make no new bids for Rooney.
Chief executive Woodward - backed by the champions' American owners - put his views in writing in a â€˜Dear Roman...â€™ message aimed to block a new bid.
United have turned down two offers for unsettled Rooney from the Roman Abramovich-owned Londoners and are expected to knock back a third.
Woodward hopes that the letter - which asks Chelsea not to make any further bids and to stop commenting on Rooney, while spelling out United have no intention of selling the England forward - would see an end to the summer-long transfer saga.
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