Pre-election surveys showed a tight race between conservative four-time presidential hopeful Keiko Fujimori and leftist ex-minister Roberto Sanchez.Sanchez, a psychologist, surged late in the race to reach the runoff, thanks to strong support in rural areas.From the Andes to the Amazon, around 27 million Peruvians can cast ballots to choose a president for a five-year term.The first round was marred by logistical problems and a vote count that took weeks to complete, deepening distrust in Peru's creaking institutions."I hope the entire process is carried out transparently, that the people's vote is respected" early voter Evelyn Pazos, 43, told AFP.On the eve of the election, a judge said Sanchez must stand trial over past financial irregularities in his party, raising claims of interference.If he wins, he would have presidential immunity, though remain vulnerable to the country's right-leaning legislature -- which has ousted several recent presidents.Fujimori, 51, appeals to the mixed legacy of her late father, who stabilized the economy and defeated a Maoist insurgency, but was convicted of corruption and crimes against humanity.She is hoping to ride a surge of support for right-wing US-backed politicians across Latin America who have won recent elections in Bolivia, Chile, Ecuador and beyond.