Brazilians vote in deciding round of presidential election

Lula and Jair Bolsonaro (Andre Penner/Bruno Prada/AP)

Brazilians began voting on Sunday morning in a polarising presidential runoff election that pits an incumbent vowing to safeguard conservative Christian values against a former president promising to return the country to a more prosperous past.

The runoff shaped up as a close contest between President Jair Bolsonaro and his political nemesis, former president Luiz Inacio Lula da Silva. Both are well-known, divisive political figures who stir passion as much as loathing.