Brazil reached the semi-finals of the Confederations Cup with a comfortable 3-0 win over an unambitious United States side in Pretoria.
After a controversial 4-3 victory over Egypt in their opening game Dunga's men were under pressure to impress.
And the Copa America champions did more than enough to earn victory over their Gold Cup counterparts as goals by Felipe Melo (7), Robinho (20) and Maicon (62) produced a scoreline that still flattered the Americans, who had Sacha Kljestan sent off in the second half.
Brazil's opening goal was typical of a more efficient style of play introduced by Dunga. Holding midfielder Melo easily lost his marker before timing his run to head home Maicon's free-kick from wide.
It was 2-0 with less than 20 minutes gone.
After DaMarcus Beasley failed to control Landon Donovan's short corner Brazil launched a ruthless counter-attack as Kaka fed Ramires near the half-way line.
The Benfica midfielder carried the ball forward briskly before feeding Robinho to his left for the Manchester City striker to stroke home easily.
Robinho and strike partner Luis Fabiano tried their luck with inaccurate efforts as half-time approached with the Sevilla man also firing a volley straight at Howard.
It should have been 3-0 in the 40th minute when Maicon's teasing cross was met by Gilberto Silva who could only head over from close range. Two minutes later Melo fired wildly over after Maicon's crossed free-kick.
The United States had the first chance of the second half but Jozy Altidore's unrefined attempt was never close to troubling Julio Cesar.
Robinho and Kaka had shots on goal minutes later, with the latter forcing a good save from Howard.
Bob Bradley's fortunes got even worse shortly before the hour mark when Kljestan was sent off for a crude tackle from behind on Ramires.
Man-of-the-match Maicon finally produced a well-deserved third in the 62nd minute, bursting through to beat Tim Howard with a deflected shot after intricate passing between Ramires and Kaka.
After a distinctly lifeless 83 minutes the United States put together arguably the move of the match. Jonathan Spector nutmegged Melo, played a quick one-two and clipped the ball back for substitute Benny Feilhaber, whose powerful shot crashed against the crossbar but bounced clear of the line.
Bradley's side hit the bar again in the closing stages as Conor Casey rose to nod Donovan's free-kick from the left only for the ball to clip the woodwork.
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