The new Selecao head coach concedes the team may have been too emotional at the World Cup and has vowed to instil more mental strength in the sideBrazil coach Dunga has called on his team to toughen up as they seek to move on from the disappointment of World Cup 2014.
The 50-year-old returned for his second spell as national team coach after Luiz Felipe Scolari left the Selecao following a 7-1 semi-final defeat to Germany, with some critics suggesting that the tearful renditions of the national anthem were a sign that Felipao's side let their emotions get the better of them.
And the new boss says the players will have to display greater mental strength if they are to be a part of his new-look Brazil side that will go in search of the Copa America next year.
"We are men and men do not cry," Dunga told Fantastico.
"The trend of the fans continuing to sing the national anthem after [the music] ended, which started at the Confederations Cup, was good, but the [players] who are there cannot be moved too much. They have to create a barrier."
Dunga will name his first Brazil squad next month for the Gillette Brasil Global Tour friendlies with Colombia and Ecuador, during which he says he will begin to find the personnel and style with which he plans to take the team forward.
"The training will happen over the friendlies, in those games we will try to find a formation," he continued.
"They are lots of young players in Europe who are showing excellent development. We're following them along with the players here in Brazil.
"We cannot, at any time, risk players losing that feeling of butterflies in their stomach [when squads are announced]. They have wait until the last moment, hoping their name will be called."