Simone Tebet urged her voters to back Lula due to his "commitment to democracy." Former President Fernando Henrique Cardoso also endorsed his leftist former rival.
Lula vs Bolsonaro: Round 1 - Latino Rebels latinorebels.com - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from latinorebels.com Daily Mail and Mail on Sunday newspapers.
Brazil's most polarised election in decades will decide whether to return to power the leftist leader who spent time in jail on corruption convictions or the right-wing populist who has attacked the voting system and threatened to contest defeat.