Supporters of incumbent leader, Dilma Rousseff, may have to patiently wait for the eventual outcome of the polls.

Despite winning most votes in Brazil’s presidential election, she has fallen short of outright victory.

She received about 42% of the votes and faces a run-off against centre-right rival Aecio Neves, who got 34%.

Analysts now predict a potentially tight second round in the Brazil election on October 26.

While Rousseff has vowed to continue to work for change, Neves wants her supporters to back him saying he represented “hope for change.”

Prominent environmentalist, Marina Silva, finished third with 21%, and is out of the race though she’s expected to meet with her socialist party’s leaders to discuss any endorsements for the run-off.

Silva and Neves had wooed a large number of anti-Rousseff voters after mass protests in 2013 illustrated growing discontent over ills ranging from corruption to poor public services.

Silva stopped just shy of endorsing Neves on Sunday night.

“There is no way to misinterpret the sentiment of voters, of the 60 percent who moved for change,” she said.

Although Neves will have momentum on his side after his showing on Sunday, and expectations that he would pick up support from many of the voters who backed Marina Silva, recent polls have given Rousseff an edge over Neves in a run-off, with an advantage of as much as 8% points.

“Brazil cannot go backwards,” Rousseff said as she celebrated her first-place finish. “I clearly understood the message from the streets and from the ballot boxes. The majority of Brazilians want us to speed up the Brazil we are building.”

Members of congress and regional governors were also elected on Sunday, where turnout was said to be 80%.