Brussels--Greek and EU-IMF negotiators were locked in last-chance talks on Sunday to avert a default by Athens that could pave the way for a catastrophic exit by Greece from the euro and sow economic chaos in Europe.
Greece's embattled premier Alexis Tsipras warned his nation on Saturday to prepare for a "difficult compromise" in what all sides agreed was the last chance for Athens to unlock vital bailout cash and keep its finances afloat.
"The talks are continuing today," European Commission spokeswoman Mina Andreeva confirmed to AFP, with the outcome and duration of the marathon sitdown still very much uncertain.
Involved in the talks that began on Saturday are Tsipras' closest aides and the three institutions responsible for overseeing the Greek bailout: the European Commission, the European Central Bank and the hardline International Monetary Fund.
On a morning jaunt outside his offices in Athens, Tsipras told reporters he was "by nature an optimist" and foresaw a positive outcome to the talks, according to the ANA news agency.
European sources however said the two sides were still far apart and that it remained unclear if the wide gaps could be bridged.
The aim of the talks is to break a five-month standoff dividing leftist-led Greece and its creditors, who are demanding tough reforms in return for the 7.2 billion euros ($8.1 billion) still remaining in Greece's huge bailout, the second since 2010.
A deal to end the saga must be resolved, or will have failed calamitously, by a meeting of the eurozone's 19 finance ministers in Luxembourg on Thursday.
It is they who have the final say on any agreement and who control the bailout purse-strings.
"The last stop to this train is the Eurogroup," a senior EU official told AFP.
But any deal also needs to go to many national parliaments, including in European paymaster Germany, and win approval before the bailout expires on June 30.
On June 30, Greece also faces a huge 1.6 billion euro payment to the IMF that even Greek officials admit they cannot afford without the bailout cash.
AFP