Dunga's tactic of getting his players to share rooms has paid off .Brazil won their game against Ecuador extending Dunga's unbeaten streak to five matches.
The Ecuadoreans were reduced to 10 men in the first half when Antonio Valencia was sent off for a reckless challenge on Dudu Caerense.
The coaches had different views on that sending off.
"This match confirms to me that we are heading the right direction," said Dunga ``It is often much more difficult to play against 10 than 11."
Ecuador coach Luis Suarez said "We were doing pretty well when we were 11 players, but it is always very complicated to play Brazil and it is a lot more difficult when you are a man down."