Brazil coach Dunga has named a 24-man squad ahead of the final two games in the South America zone to give players experience with qualification to South Africa 2010 already secured.
Brazil play at altitude in Bolivia on 11 October, and three days later they host Venezuela.
"We called more players for that reason. We have two games ahead and the first one is very wearing, but we'll try to do our best in Bolivia," he said. "We will make a decision following the condition the players have at that point.
"Despite we have already qualified, we're Brazil and we have to win always. We try to keep the group and give chances to some new players."
Werder Bremen defender Naldo receives a first call-up for two years and Spartak Moscow midfielder Alex is also selected.