Udinese today confirmed they will take Portsmouth to the Court of Arbitration for Sport in a bid to recoup money they claim to be owed following the sale of Sulley Muntari.
Muntari joined Portsmouth from Udinese in 2007 for a reported fee of £7million and moved on to Inter Milan in 2008 for around £12.7million.
A Udinese press spokesperson told Press Association Sport: "I can confirm that Udinese today has reported Portsmouth to the Court of Arbitration for Sport in Lausanne in connection with a missed payment for Sulley Muntari."
Portsmouth reportedly owe Udinese around £3.5million in outstanding fees involved in the Muntari transfer.
The Barclays Premier League's bottom club are currently under a transfer embargo which was put in place in October.
Last week, rather than hand over TV money which Portsmouth were scheduled to receive, the Premier League passed funds directly to teams to whom the south-coast club owed money.
Pompey have written to the Premier League demanding that the embargo be lifted.
Portsmouth are also preparing to appeal against a High Court judge's decision to dismiss their application to have a winding-up petition from Her Majesty's Revenue and Customs struck out.
The club have argued that the VAT portion of the massive tax bill is too high by £7.5million.
Portsmouth yesterday confirmed they are being sued by their former player Sol Campbell.
Campbell, now at Arsenal, has issued a writ through his lawyers for £1.7million which he says he is owed in image rights and bonus payments.
Portsmouth confirmed the receipt of that writ, which they said was being dealt with by club lawyers.Reuse content