The Welsh midfielder has been the subject of an Anfield enquiry, believed to be £10m plus Jonjo Shelvey on a season-long loan, despite the terms of Brendan Rodgers' exit from the Liberty Stadium to Liverpool supposedly preventing him signing Swansea players for the next 12 months.
Liverpool hope to exploit a technicality to sign the 22-year-old, who has a clause in the four-year contract he signed last season that allows a move to join one of five leading clubs for £15m. Swansea are also incensed that details of Allen's contract have been made public.
A club spokesman said: "Swansea City can confirm that Liverpool have expressed an interest in Joe Allen, despite a written agreement with Liverpool not to approach any players within the 12-month period of former manager Brendan Rodgers leaving for Anfield. There has also been interest from other clubs regarding his possible availability and the club is due to speak to Joe, as originally planned, about the situation when he returns from GB duty.
"The club is not prepared to release any details on whether any formal bids have been made at this stage or details of Joe's contract, which are private and confidential. The club is extremely disappointed that speculation regarding certain aspects of his contract have been released to the media by parties outside the club."
It had been claimed that Swansea would be unable to resist a Â£10m offer for Allen but the spokesman added: "Fortunately the club is in a financial position where it does not need to sell any of its players and will continue to work in the best interests of its supporters, who are our priority, and the club to provide new manager Michael Laudrup with the best opportunity to be successful in the forthcoming Premier League campaign."
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