Flavio Bolsonaro, the son of former far-right populist President Jair Bolsonaro, is taking on incumbent left-wing President Lula da Silva. Polls show the first round of voting will likely lead to a runoff.
According to polls in the first ballot, none of the candidates will reach the necessary majority. Sunday's election takes place under concerns about foreign influences.
An analysis of THE COUNTRY America with the polls shows a technical tie between the two in the final vote. But the predictive markets give Bolsonaro as favorite