Dunga's Selecao take on Chile today in the last 16, with the 2002 champions hot favourites against a suspension-hit Roja.
And the 1994 winning captain made it clear that this game was his only focus, admitting he does not know if he will continue on the Selecao bench beyond this World Cup.
"I never thought once about what I would do after the four years I have completed in the job," the coach told reporters in Sunday's press conference.
"Sincerely, my only focus has been here in the World Cup and on the squad. What happens after does not interest me much, only what happens here."
Dunga has consistently said since taking over in 2006 that he saw his role as a four-year cycle, culminating in this World Cup. The rookie coach would admit however that he owes a great debt to the CBF for taking a chance on him after Brazil's disappointing campaign in Germany.
"I am making the most of my chance and I have to thank the president [of the CBF, Ricardo Teixeira] for letting me direct the Selecao, for letting me put in practice here my interpretation of football," he added as Brazil prepared for the crucial South American derby.