Bolsonaro, the son of former President Jair Bolsonaro, called into question a late-Sunday decision by a Lula-appointed Supreme Court justice that extended voting by two hours over alleged voter transport irregularities. He said he would ask for the result to be annulled.

The ⁠scale of Bolsonaro's loss, with the senator trailing Lula by over 4 million votes, makes it unlikely his efforts to annul the vote will succeed, analysts said.

His petition is also undermined by the fact that his campaign also sought a voting extension due to heavy rains in the conservative-leaning south.