Former Greek prime minister Alexis Tsipras’s leftist Syriza party said yesterday it remained confident of winning an outright victory in a September 20 election despite an opinion poll that showed its main conservative rival edging ahead slowly but surely.

Just a few weeks ago, a Syriza victory in the snap election had appeared almost certain as Greeks lauded the charismatic and youthful Tsipras for waging a bruising battle against European and International Monetary Fund creditors over austerity cuts.

But opinion polls over the past week have shown the New Democracy party run by Evangelos Meimarakis catching up quickly, with one showing it even overtaking Syriza, suggesting a surprisingly tight contest.

A senior Syriza official played down New Democracy’s sudden spurt of momentum, reiterating his party’s ambition to win an absolute majority in parliament - the hope that propelled Tsipras to call the snap vote after clinching a bailout deal.

Meimarakis is being seen as a safer option than Tsipras among many Greeks

“Our objective continues to be an outright majority in Parliament and in this case we would want to team up with the Independent Greeks,” Panos Skourletis, a former energy minister and close aide to Tsipras, told Mega TV, referring to Syriza’s former right-wing coalition ally.

He reiterated Syriza’s stance against an alliance with New Democracy. By contrast, the conservatives have said they are open to a broad alliance to help steer Greece through its worst post-war economic crisis.

According to the GPO poll, Syriza’s stance is not backed by most Greeks – 59 per cent of respondents preferred a coalition administration over a one-party government.

Greek former Prime Minister Alexis Tsipras (centre) is welcomed by members of his Syriza party during a meeting in Athens.

The poll also showed Syriza set to win 25 per cent of votes, just behind New Democracy on 25.3 per cent. More than one in 10 voters remained undecided, meaning the final outcome is far from certain.

A separate poll by Pulse, published yesterday, showed Syriza clinging to a slender lead of 25.5 per cent against New Democracy’s 25 per cent.

The biggest surprise in Wednesday’s poll was that Meimarakis, 61, a centrist figure within New Democracy who only took the conservative party’s reins in July and has since tried to unite its various factions, was more popular than Tsipras.

He was shown with 44.3 percent approval ratings, compared to Tsipras’s 41.9 percent - a major reversal for the leftist leader, who had enjoyed ratings of up to 70 percent while he battled foreign creditors over a new bailout programme.

Tsipras ultimately backed down and accepted a bailout and tough austerity policies in exchange for aid under the threat of a Greek exit from the euro, but only after shutting banks for three weeks and imposing capital controls to stop Greeks rushing to withdraw their bank deposits.

Polls now show most Greeks disapproved of how Tsipras, 41, managed the negotiations with creditors and of the final outcome - a bailout considered tougher than the previous two that has included a new round of punitive taxes and spending cuts.

Meimarakis has benefitted from keeping a low profile and is seen as a safer option among many Greeks disillusioned with their political choices, pollsters say.

“When it comes to undecided voters and they are asked who can solve most of Greece’s problems, Meimarakis is favoured,” said one pollster, who declined to be named because the findings had not been published yet.