Greeks have gone to the polls in the first election since the country's economy ceased to be subject to international lenders. Conservative Prime Minister Kyriakos Mitsotakis and the leader of the left-wing Syriza party, Alexis Tsipras, are the two main contenders vying for power. Mitsotakis' New Democracy party is ahead in the polls, but the new electoral system of proportional representation means his 40% vote share is not enough to secure a majority of the 300 seats in Parliament. He has indicated he will seek a second election if necessary.