In the first round of the polarized presidential election, with an initial field of nine candidates, Lula won 48% of the votes against 43% for Bolsonaro, setting the terrain for an unexpectedly competitive runoff on Oct. 30.Register now for FREE unlimited access to Reuters.com"The snapshot from this survey shows a more difficult fight for Lula than appeared at first, but with a certain advantage setting in for Lula that will be difficult to overcome," said Andrei Roman, chief executive of AtlasIntel.AtlasIntel was one of several polling firms criticized for underestimating support for Bolsonaro in the first round, although it was closer than several more traditional pollsters.Thursday's poll showed that 53.3% of Brazilian voters disapprove of Bolsonaro's performance as president, versus 44.2% that approve of his way of governing Brazil, improving significantly from March, when 65% disapproved and 33% approved.Bolsonaro needs to gain 6 million additional votes to win re-election, while Lula needs 1.2 million to get elected in what would be a third term for the former president who served from 2003-2010."