Tuttosport - Estigarribia, the mystery of the missing documents

There is some mystery about the situation Estigarribia. The player has passed a medical but for the moment can not 'work out as it can not' still be signing the contract as missing documents, critical to closing the deal. A real little yellow.
As reported in today's Tuttosport, Juventus is confident that tomorrow we can unlock the situation and the player will be available to count before leaving for Paraguay to answer the call of his country.

It could be the first training session the player with Juventus, because then the return is scheduled for September 8, with a few days to prepare the home debut against Parma.

I wa just wondering whats going on about this. We saw him pass the medical, but then no official statement ever came out. So is he still in turin, finishing up this deal, or whats going on?