Brazilian president and re-election candidate Luiz Inacio Lula da Silva (bottom-right) waves a Brazilian flag during a campaign event in Rio de Janeiro. (EPA Images pic)RIO DE JANEIRO: Copacabana beach turned red for President Luiz Inacio Lula da Silva as hundreds of bikers revved their engines for right-winger Flavio Bolsonaro on Saturday, the eve of Brazil's nail-biter election.

Tens of thousands of supporters flooded the streets as the incumbent and his rival wrap up a bitter campaign that has left Latin America's biggest nation more polarised than ever.

Lula, who turns 81 next week, jumped up and down on the back of a campaign truck, waving a massive Brazilian flag as he made his way through throngs of supporters wearing the red of his Workers' Party (PT).