President Luiz Inacio Lula da Silva of Brazil says he is confident he will be re-elected when he faces his closest challenger in a second round of voting, writes BBC online, Tuesday.
Lula failed to secure an outright victory over Geraldo Alckmin in the first round of the election on Sunday.
He secured 48% of the vote, falling short of the 50% required to avoid a run-off on 29 October, officials say.
Mr Alckmin gained ground late in the campaign, after President Lula’s party was accused of dirty tricks.
The former Sao Paulo governor took 41.4% of the vote.
The final result was confirmed by the country’s electoral court on Monday evening.