Prime Minister António Costa's Socialist Party is neck and neck with Rui Rio's Social Democratic Party.
With Sunday's election in Portugal going down to the wire, Euronews reports from Brussels where enthusiasm for the election is low, despite the impact it may have on the EU.
The parliamentary vote will decide who becomes the next Portuguese prime minister, with Socialist António Costa hoping for a new term, but with Social Democrat rival Rui Rio closing in.
Whoever wins the battle, will be responsible for shaping the country's path in the EU.
Watch our report in the video player above.