Portugal and Brazil battle it out on Friday for the right to enter the knockout stages as Group G winners.
Both sides appear to have done enough to book their place in the last 16, with Brazil already guaranteed to grace the second round.
The Samba stars have taken maximum points from their two fixtures so far, seeing off North Korea 2-1 and Ivory Coast 3-1.
Portugal currently sit second, with four points to show for their efforts, and need just a point to confirm their safe passage.
They could, however, lose and still go through as a 7-0 mauling of North Korea has ensured that their goal difference is far superior to Ivory Coast - the only side who can end their World Cup adventure.
Carlos Queiroz will be confident, though, that his side can get the positive result they require to make absolutely sure, with Portugal unbeaten in their last 17 matches.
They will also be looking to avenge the 6-2 defeat they suffered at the hands of Brazil the last time the two nations went head-to-head, in a friendly contest back in 2008.
"We don't want the Brazilians to score past us this time - it is a question of honour," said Queiroz.
Victory for Portugal would see them snatch top spot, while a draw would allow Brazil to ease through.
Taking first place could be crucial, as the runners-up are likely to have to face Spain in the second round.
Brazil's main concern heading into the game is how to counter the loss of influential playmaker Kaka, who must serve a suspension after being sent off against Ivory Coast.
Coach Dunga could choose to move Robinho into a more central position, giving him more freedom to express himself, while Nilmar and Julio Baptista will also be hoping to be given the opportunity to impress.
The fitness of Elano is a slight worry ahead of the crunch clash, with the Galatasaray man given the all-clear after being stretchered off against Ivory Coast only to suffer a calf strain in training.
Portugal have no fresh injury or suspension concerns to contend with, but are still expecting to be without Deco.
The creative midfielder continues to struggle with a hip problem and will undergo an MRI scan before ruling himself in or out of the Brazil clash.
However, having hammered North Korea last time out, it would be a surprise if Queiroz were to shuffle his pack.
That means Deco is likely to be benched anyway, having missed that game, while Hugo Almeida will continue to occupy the lone striker role in favour of Liedson.