Nearly 159 million people to head to polls on Sunday in battle between leftwing incumbent and Flávio Bolsonaro

More than one million supporters of Brazil’s leftwing president, Luiz Inácio Lula da Silva, have streamed on to Rio’s most famous beach for a giant protest they hope will propel him towards a historic election fightback against his far-right rival, Flávio Bolsonaro.

Nearly 159m Brazilians will vote in the election’s runoff on Sunday, with the pair tied in the polls after Bolsonaro won the first round on 4 October by 47% to 45%.

On Saturday, under a fierce sun, red-clad crowds packed the 2.5-mile Copacabana beach in an attempt to help Lula clinch a dramatic and unprecedented comeback. Never since the return of democracy to Brazil in the 1980s has the first-round loser managed to bounce back.