The left-wing runner-up in Sunday's presidential poll in Mexico has said he will demand a total recount of the vote.
Andres Manuel Lopez Obrador told reporters that for the good of democracy and of the country, all the votes must be recounted.
He had refused to concede victory after rival Enrique Pena Nieto came first in preliminary results.
Lopez Obrador has accused Pena Nieto of breaking electoral rules.
Pena Nieto declared himself the winner of Sunday's presidential election after a preliminary count.