Vasco de Gama president Pedrinho admits talks are continuing over the signing of Philippe Coutinho.
Pedrinho concedes the deal isn't straightforward for the Villa midfielder, who was on-loan with Al Duhail last season.
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He explained: "Regarding Coutinho, I will take the liberty because I am the one who has been playing from the beginning," he said.
"It is not a simple negotiation, as people think and say. Coutinho must lose his link with the Qatari club and also rent Aston Villa for a year.
"The bureaucracy is tedious and time-consuming and it is no one's fault, it is part of the process that needs to be addressed."