Udinese have reacted angrily to Sulley Muntari's insistence that he is almost certain to join Portsmouth.
The Ghanaian international claimed that he was "99 percent sure" that a deal would be done with the English club.
Harry Redknapp's side have reportedly offered é¼12 million (£8.2 million) for the player so far, while the Italians are thought to be holding out for no less than é¼16 million (£10.9 million).
With the close of the transfer window coming at the end of the month, Udinese general director Roberto Zanzi has expressed scepticism about the completion of a deal.
"In the end maybe that one percent will be the downfall of the negotiations," he explained.
"Should the manager [Redknapp] have spoken to the player, it would be a very serious issue."
Muntari was in England for Ghana's 2-0 win over Togo on Tuesday, which was hosted at Brentford's Griffin Park.
Meanwhile Redknapp has hailed his latest arrival from Manchester City, as he looks to shore up Pompey's leaky backline.
"I had to get a goalie in and I couldn't get a better one than David James," Redknapp told Sky Sports News.
"I could have brought a foreigner in who maybe doesn't speak the language and comes in here and suddenly it's not easy.
"Jamo comes in and he's got presence. I still think he's as good as anybody around, I really do.
"People always highlight his odd mistake, but he can win you so many games as well with his great ability. I'm delighted to have him."
The former England number one is set to make his competitive debut for the club as they take on Blackburn Rovers at home on Saturday.