Brazil faces Ivory Coast on Sunday with the chance to reach the second round of the World Cup with a game to spare in Group G.
Victory would allow Brazil to relax and maybe even rest some players in its last group match against Portugal on June 25.
"We gained confidence with the first victory and we need another one now to guarantee a place in the next round," Brazil striker Nilmar said. "We can do it in advance, so we need to try to go for it."
Brazil began the World Cup with a hard-fought 2-1 win over the lowly ranked North Korea on Tuesday in Johannesburg, while the Ivory Coast played well but was held to a 0-0 draw by Portugal in Port Elizabeth.
"If we defend well, we should be able to get a good result," Ivory Coast defender Emmanuel Eboue said. "(Brazil is) a great team, everybody knows this, but this motivates us and again we have to play at our best."
It is unclear whether Didier Drogba will start for Ivory Coast at Soccer City Stadium on Sunday, but he made a successful return from a broken arm with a 24-minute substitute appearance against Portugal.
Drogba looked untroubled by the injury he sustained in a World Cup warmup on June 4 and coach Sven-Goran Eriksson has suggested he could play a bigger role in the second match.
"Every player feels very, very well and we've got confidence in ourselves," Eboue said. "If Drogba plays, it will be very great for us."
The Brazilians are hoping Ivory Coast will not defend too deep Sunday and create the same problems that North Korea did in the opener. Brazil struggled to come up with scoring opportunities and needed second-half goals to earn victory at Ellis Park.
"Ivory Coast will come out playing more offensively and that should give us some openings," Brazil goalkeeper Julio Cesar said. "It's harder for us if a team plays only thinking about defending and not about attacking."
Brazil would reach six points with a victory, enough to make it one of the two teams that advance from the group. Ivory Coast would not be eliminated with a loss, but it could make it very hard for the African nation to advance if Portugal racks up a big win against North Korea.
It will be the first match between Brazil and Ivory Coast, but Brazil has won all five of its previous World Cup meetings with African teams. The most recent was four years ago, when the Brazilians defeated Ghana 3-0 in the round of 16 before losing a quarterfinal to France.
"It will be a difficult game for us," Ivory Coast midfielder Cheick Tiote said. "Brazil is very strong in attack so we have to watch out for that. We will have to be well-organized and attack when we can and when we have to."
Coach Dunga acknowledged that Brazil was below its best against North Korea, but was expecting natural improvement.
"The tendency is for us to improve as we play more matches," Brazil striker Robinho said. "Hopefully it will be enough to give us the win against the Ivory Coast and a spot in the next round."
Robinho could take over the playmaker's role on Sunday if Kaka continues to struggle to find his form after entering the World Cup recovering from a series of injuries with Real Madrid.
Kaka was far from his best in the match against North Korea and was substituted in the 78th minute. If he doesn't play the entire match on Sunday, Robinho could move back to midfield.
Wolfsburg midfielder Josue replaced Gilberto Silva for a few minutes in a closed training session on Friday, but it wasn't clear whether Gilberto Silva would remain a starter. The Brazilian football federation neither confirmed nor denied that he was injured, as reported by some Brazilian media.
Brazil has played in all 19 World Cups so far, while Ivory Coast is playing only in its second. It failed to get past the group stage four years ago in Germany.
