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), Manchester City striker Robinho (20) and Maicon (62) produced a scoreline which still flattered the Americans, who had Sacha Kljestan sent off in the second half.
Mohamed Homos scored the only goal as Egypt claimed a memorable victory over Italy in Johannesburg.
The Pharaohs, who came into the game needing to avoid defeat to retain hopes of making the semi-finals, looked lively throughout and were rewarded with a 40th-minute strike from the Ismaily midfielder.
They then had stand-in captain and goalkeeper Essam El Hadary to thank after he produced a string of fine saves to help them hold on for all three points in Group B.
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