Match ends, Brazil 1, Colombia 0.
Neymar scored the only goal of the game seven minutes from time as Dunga's second spell as Brazil boss began with a win over 10-man Colombia in Miami.
Barcelona forward Neymar curled home a free-kick to give the Selecao victory in their first game since finishing fourth at their home World Cup.
Colombia had been reduced to 10 men on 49 minutes, when Juan Cuadrado was sent off for a second bookable offence.
New Manchester United striker Radamel Falcao featured for 13 minutes.
The 28-year-old, who joined the Red Devils on loan for £6m on transfer deadline day, missed the World Cup after sustaining anterior cruciate ligament damage in January.
But his return as a late substitute for Colombia failed to prevent Neymar, captaining his country for the first time, from taking centre stage in front of a 73,429 crowd at Sun Life Stadium.
Two months after a challenge from Colombia's Juan Zuniga ended his World Cup at the quarter-final stage, the two players hugged on the pitch before kick-off.
Despite that, there was no shortage of tough tackles, with seven players booked.
Brazil had the better of the chances, and Diego Tardelli had a first-half effort ruled out for offside, but they could not find a way through until Neymar's late intervention.
Falcao had a a late opportunity to equalise, but could not divert his close-range header on target.
Dunga, who succeeded Luiz Felipe Scolari, said. "It is always good to win, especially with the criticism after the World Cup, some of which was very strong.
"This will help the players to regain self-esteem and confidence."
- 1de Oliveira Galvao
- 4David LuizSubstituted forMarquinhosat 80'minutes
- 6Filipe Luís
- 8Santos do NascimentoBooked at 29minsSubstituted forMendes Trindadeat 45'minutes
- 17DiasBooked at 33minsSubstituted forFernandinhoat 45'minutes
- 19WillianSubstituted forde Barros Ribeiroat 72'minutes
- 11OscarSubstituted forCoutinhoat 72'minutes
- 9Tardelli MartinsSubstituted forde Souzaat 77'minutes
- 7de Souza
- 14Nascimento Silva
- 18de Barros Ribeiro
- 20Goulart Pereira
- 22Mendes Trindade
- 18ZuñigaBooked at 39minsSubstituted forMejíaat 73'minutes
- 23ValdésBooked at 45mins
- 5Leão RamírezSubstituted forAriasat 45'minutes
- 6C SánchezBooked at 30minsSubstituted forRamosat 85'minutes
- 11Ju CuadradoBooked at 49mins
- 10RodríguezSubstituted forFalcaoat 77'minutes
- 19GutiérrezBooked at 56minsSubstituted forBaccaat 65'minutes
- 21MartínezSubstituted forGuarínat 65'minutes
- David Gantar
- Shots on Target
Second Half ends, Brazil 1, Colombia 0.
Offside, Brazil. Miranda tries a through ball, but Everton Ribeiro is caught offside.
Attempt missed. Pablo Armero (Colombia) left footed shot from outside the box misses to the right following a corner.
Corner, Colombia. Conceded by Maicon.
Attempt missed. Neymar (Brazil) right footed shot from outside the box is high and wide to the right. Assisted by Fernandinho.
Corner, Brazil. Conceded by Fredy Guarín.
Attempt blocked. Robinho (Brazil) left footed shot from the centre of the box is blocked. Assisted by Neymar.
Offside, Brazil. Philippe Coutinho tries a through ball, but Neymar is caught offside.
Substitution, Colombia. Adrián Ramos replaces Carlos Sánchez.
Foul by Filipe Luis (Brazil).
Fredy Guarín (Colombia) wins a free kick on the right wing.
Goal! Brazil 1, Colombia 0. Neymar (Brazil) from a free kick with a right footed shot to the top right corner.
Hand ball by Cristian Zapata (Colombia).
Substitution, Brazil. Marquinhos replaces David Luiz because of an injury.
Delay over. They are ready to continue.
Delay in match David Luiz (Brazil) because of an injury.
Substitution, Colombia. Falcao replaces James Rodríguez.
Substitution, Brazil. Robinho replaces Diego Tardelli.
Foul by Philippe Coutinho (Brazil).