SAO PAULO, Sept 7 (Reuters) - Brazilian leftist President Luiz Inacio Lula da Silva and right-wing challenger Senator Flavio Bolsonaro are tied in a potential second-round runoff in October's election, a Quaest poll commissioned by Globo showed on Monday.
In a simulated runoff, Lula would win 41% of the vote against 41% for the eldest son of former President Jair Bolsonaro. A Quaest poll released on September 2 had Lula leading Bolsonaro 42% to 41%.
Quaest surveyed 2,004 people between September 3-6. The poll has a margin of error of 2 percentage points.
(Reporting by Eduardo Simoes and Gabriel Araujo; Editing by Paul Simao)
