“I have my sources of information that there really was a lot of fraud there," he said. “Nobody talks about that. If it was enough to define (victory) for one or the other, I don't know."
Asked if he would recognize Biden's victory, he said, “I am holding back a little more."
He also expressed doubts about Brazil's current electronic voting system, which he has suggested is vulnerable to fraud. He has urged the country to go back to a paper ballot system for the 2022 presidential election.
The conservative Brazilian leader has appealed to the same sort of right-wing populist base in Brazil that Trump has courted in the United States, and has welcomed comparisons to the US president.
Like Trump, he has embraced unproven treatments for the new coronavirus and has campaigned to ease restrictions meant to combat it, arguing the economic loss is more damaging than the illness itself.