Brazil coach Dunga has demanded more from his side after their narrow success over North Korea in their opening World Cup match at Ellis Park.
The five-time World Cup winners were made to work every step of the way for their 2-1 victory and struggled to break down a well-drilled North Korea defence on a chilly evening in Johannesburg.
Dunga's men left the field at the interval with the score locked at 0-0 but they finally managed to break the deadlock in the second period.
Maicon's bullet strike from an almost impossible angle in the 55th minute set the Selecao on their way before Robinho set up Elano for a second 18 minutes from time.
There was still time for the Chollima to reply, with Ji Yun-Nam bursting into the box and firing home after being found by Jong Tae-Se's header.
Dunga admitted his side suffered from some nerves and has called for greater penetration in the coming matches against Ivory Coast and Portugal.
He said: "The start is the most difficult match, you have a long wait for this and the anxiety builds up.
"I'm satisfied with the win, but I want more, I want us to score more goals."
Robinho was Brazil's outstanding performer on the night, with the Manchester City forward, who is currently on loan at Santos providing the pass of the tournament so far to set up Elano for the second goal.
The talented attacker, who showed great desire and purpose alongside his usual flicks and tricks, admitted North Korea had made them work very hard.
"They played very defensively and in this kind of game you have to have patience and when you don't get a goal, it gets difficult," Brazil forward Robinho told Brazilian TV.
"But we won deservedly. Now we can lift our heads and look to qualify in the next game."
Maicon appeared overcome with emotion after his goal, just as North Korea striker Tae-Se was during the national anthems, and admitted it had been a special moment to score for his country on his World Cup bow.
The Inter Milan right-back said: "I thought of everything which I went through to get to this moment.
"It was my first World Cup match, I didn't cry but I was very happy with the goal I scored."