Firing off personal attacks, Brazil's President Luiz Inácio Lula da Silva and right-wing senator Flávio Bolsonaro held an acrimonious first debate on Sunday, a week before a tight presidential election runoff.
A chaotic exchange between the two men, who called each other liars on multiple occasions, accusing each other of corruption and dragging up various scandals, encapsulated the tone of a bitter election campaign in the deeply polarised nation.
