The wrangle over Sulley Muntari is set to be heard in an Italian court in March.
Inter Milan and Udinese are embroiled in a disagreement over 1m owed to Pompey.
The Blues are entitled to a windfall from Inter, triggered after Muntari reached a set number of appearances since his Fratton Park departure.
Yet the Italian giants have instead handed that payment to Udinese, who themselves claim they are owed money by Pompey.
Udinese insist part of the original transfer fee when Muntari, below, joined the Blues in the summer of 2007 is outstanding.
They also believe they are due around 500,000 after Pompey reached the FA Cup final last season.
In the meantime, Pompey are still awaiting payment, with Inter refusing to give another 1m.
Now an Italian court will attempt to unravel the mess and end the stalemate.
They will adjudicate in March.
It's an on-going saga which continues to frustrate Pompey, who have also enlisted the help of Fifa.
And Fratton Park chief executive David Lampitt is hoping crucial headway can be made in the Italian courts.
He said: 'The court date has been put back to March so hopefully things can be sorted then.
'There is an assignment of debt between Inter and Udinese and the court has to decide how it is dealt with.
'Obviously, this is a frustrating issue for us and we are continuing to pursue an outcome.
'We just have to keep fighting for what is rightfully ours.'
Muntari has made 59 appearances and scored five goals since his switch to Inter in the summer of 2009.
In his one season at Fratton Park, the powerful midfielder played 33 times and scored five goals.