Dunga wants to include the 27-year-old as one of three over-age players for the competition on home soil this August, but he will have to gain permission from Chelsea
Selecao authorities have been buoyed by the news that Barcelona will release their star to lead his side out at the home Olympics this August.
And with Inter defender Miranda also a shoe-in for selection, Willian is slated by Dunga as the third and final over-23 member of the squad - provided, of course, Chelsea give their blessing for the midfielder to be included.
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The emergence of young Benfica starlet Ederson seems to have given the Blues man the edge as Dunga begins preparations for the Copa America in United States followed rapidly by the Games.
The 22-year-old's fine performances between the posts in Portugal may have convinced the coach to leave Internacional shot-stopper Alisson out of the squad, clearing the way for another outfield player to be called up.
Dani Alves, of Barcelona, and Wolfsburg's Luiz Gustavo were also considered for Rio, but eventually ruled out after their clubs refused to release the pair.