SAO PAULO, (Brazil): Flavio Bolsonaro was seen as a less charismatic version of his firebrand father, jailed former Brazilian president Jair Bolsonaro, yet still came out on top in the first round of the election.

The right-wing senator received 47 per cent of the vote compared with 45 per cent for leftist incumbent Luiz Inacio Lula da Silva.

AFP looks at the reasons behind the shock first-round lead making Flavio Bolsonaro, 45, a favorite to win the October 25 runoff.

- Household name -

Jair Bolsonaro chose his eldest son to lead the family's political project after the ex-leader was convicted of coup-plotting and barred from running for office until 2030.