Neymar scored all four goals in a sumptuous display for Brazil as the five-time world champions routed an under-strength Japan 4-0 in a friendly in Singapore to maintain Dunga's perfect start since returning as coach.
The Brazilian skipper took his impressive tally to 40 goals in 58 matches after his strikes against a shabby Japanese side on a patchy National Stadium pitch deemed "far short of international standards" by Singapore's Football Association.
The win was a fourth out of four for Dunga's Brazil, who have yet to concede a goal since he returned with the task of rebuilding the side after their humiliating 7-1 World Cup semi-final defeat to Germany and 3-0 loss to the Netherlands in the third-place match.
Elsewhere, Lionel Messi scored twice after coming off the bench as an experimental Argentina side destroyed Hong Kong 7-0 in another friendly mismatch.
Argentina fielded a completely different line-up from the one which lost to Brazil last week but the World Cup finalists still waltzed to a facile triumph.
The home crowd, some dressed in Argentina jerseys at the Hong Kong Stadium, saved their loudest cheers for the arrival of substitute Messi, who came on after an hour to score twice and make another goal.