Sanchez, ally of ousted and jailed former President Pedro Castillo, has recently moderated his messaging and secured 43.8% of support in the poll. Fujimori, daughter of former president Alberto Fujimori, gained 43.2% of the intended vote, the poll showed.
BY THE NUMBERS
The poll was conducted on June 3 and has a margin of error of plus or minus 2.1%, sources close to Ipsos said.
About 13% of poll respondents voted blank or annulled their ballot.
A previous Ipsos poll released May 31 showed Fujimori at 38% and Sanchez at 35%, with 27% of voters still undecided.
Fujimori, running for the fourth time and considered pro-market, won the first round of the presidential vote on April 12 with 17.18% of votes.
Sanchez narrowly came second with 12.03% of votes.
It is illegal within Peru to publish polls during the last week before a presidential election. Surveys can be carried out as long as local media do not publish them.
(Reporting by Marco Aquino, Editing by Daina Beth Solomon)

Peruvian presidential candidate Roberto Sanchez (R) speaks during a press conference with other political leaders in Lima, Peru, 04 June 2026. Sanchez will face Peruvian presidential candidate Keiko Fujimori in the 07 June presidential runoff election. EPA/JOHN REYES