After suffering a 2-0 defeat to Copa America champions Chile in the opening match of the World Cup qualifiers, Brazil will know only a win will do against Venezuela on Tuesday.
Against Chile, Brazil always looked second best, rarely providing any sort of threat going forward without the suspended Neymar, who will also miss this match against Venezuela.
Try as he might to suggest otherwise, Dunga knows he really does not have enough quality available to bring back those glory days for Brazil. Neymar is their only real superstar, and when the Barcelona man is missing, Brazil looks like a very beatable outfit.
"Against Chile we did some things well and other things not so well," Xinhua quoted Dunga as saying. "Brazil needs to smile. We need to play with enjoyment.
"Everybody has their own opinion and we respect that. There will be people doubting us until we win. We have to learn to live with the criticism, but we are doing all we can to win."
Brazil beat Venezuela 2-1 in the Copa America in June, and Dunga will hope some of that victory feeling rubs off on his players when they take field in Fortaleza.
Venezuela did not have the greatest of starts in their first match either, going down 1-0 to Paraguay to home.
A late goal from Derlis Gonzalez proved to be the decider in that match, and Paraguay will hope to have those concentration levels high right until the final whistle against Brazil, who will be without David Luis for this 2018 World Cup qualifier.
"That mistake proved costly," Venezuela coach Noel Sanvicente was quoted as saying on his football federation's website, referring to the goal. "But the team played well and showed character.
"We wanted to start well and we didn't deserve to lose but we must look ahead.
"I saw a lot of positives from our game against Paraguay. When you lose games at home you need to go and search for wins away. We know how strong Brazil is but I always say there is a first time. We need to be more aggressive up front."
An early goal will be the key, and Brazil will hope it is one of their players scoring that opening strike to ease those nerves both on the pitch and amongst the stands.
Where to Watch Live
Brazil vs Venezuela is scheduled for an 6.30 am IST, 2 am BST, 9 pm ET start. Sony Kix and Sony Six HD will show the match live in India. Viewers in India can also watch the 2018 South American World Cup qualifier by live streaming on Livsports.in.
Viewers in USA, Canada, North Africa and the Middle East can watch Brazil vs Venezuela live on Bein Sports, while the game can also be live streamed on Bein Sports Connect.
The match will be shown live in Brazil on Globo and SporTV, while audience in Venezuela can catch the action live on Tves and Meridiano.
Viewers in South Africa and Sub Saharan Africa can watch Brazil vs Venezuela live on SuperSport, with the live stream option on SuperSport Live Video.