Chelsea midfielder Deco has already agreed personal terms with Fluminense, according to the president of the group that owns the Brazilian club.
The Brazil-born Portugal international has long been expected to leave Stamford Bridge and he said in the last domestic season that he wanted to return to South America.
That could soon become reality as Fluminense claim that discussions with Deco have reached a positive conclusion and that all that is left to address is a deal with Chelsea and the 32-year-old's medical.
"As Deco himself said, the deal is well under way," said Celso Barros, the president of the group which owns Fluminense, a club based in Rio de Janeiro.
"It depends only on him being released by Chelsea and passing the medical tests, because the salary and length of contract have already been agreed.
"We will not talk this Wednesday, but in principle Deco will go to London to try to expedite his release with Chelsea.
"That done, he has asked Fluminense for at least a week to be with his children in Brazil and then he will report for medical tests and to start training."
Deco developed his career in Europe after struggling to make the grade as a teenager in Brazil, and starred for both Porto and Barcelona before moving to Chelsea in 2008.
Born and raised in the state of Sao Paulo, he represented Portugal after moving to the country and gaining citizenship, but retired from international football following their exit from this summer's World Cup.