Talks were due to start at 6:00 AM (0930 IST), a European source told AFP, after late-night talks last evening ended without a breakthrough as Greece's leaders rejected reforms demanded debtors.
Tsipras was due to resume meetings with the heads of the European Commission, International Monetary Fund and European Central Bank - the "troika" of Greece's main bailout monitors - at 1230 IST.
They will try to finalise a deal in time to have it approved at a meeting of eurozone finance ministers later in the day, and then rubber-stamped by national leaders meeting at European Union summit today and tomorrow.
Greek government sources said two were withdrawn from the list under pressure from Tsipras's left-wing Syriza party, including an unpopular increase in pensions contributions. The Greek side is seeking to offset the changes financially with other measures, sources said.
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A European source told AFP there was "hope of an agreement between the (creditor) institutions and Greek authorities" from the talks between Tsipras and the EU-IMF.
The Eurogroup of finance ministers from the 19-country currency union also plan to restart talks on releasing further financial aid for Greece at 1630 IST today after talks the previous night ended only an hour in.
The Eurozone's main stock markets fell yesterday as initial optimism for a deal faded, with Asian equities continuing the slide this morning over fears of the global economic fallout if no deal is reached.
Anti-austerity leader Tsipras flew to Brussels early yesterday for a crunch meeting with European Commission President Jean-Claude Juncker, IMF chief Christine Lagarde and European Central Bank boss Mario Draghi.
But after the talks once again stalled, he lashed out at Greece's creditors over what he said were fresh demands they had made in addition to a reform plan Athens submitted last week to end the five-month standoff.