Greek Prime Minister Antonis Samaras on Tuesday discussed the planned sale of national gas distributor DEPA with the chief executive of Russia's Gazprom, which is among five bidders, dpa reported.
International creditors who granted Greece bailout loans have demanded that the government speed up privatisation programmes.
There was no information on what was discussed at the meeting between Samaras and Gazprom chief executive Alexei Miller. Bidders have until April 12 to make binding offers for DEPA.
International inspectors and the Greek government are finalising a new round of austerity measures which include the faster implementation of public sector job cuts.
A scheduled meeting between Samaras and the inspectors to discuss the country's progress with structural reforms and the fiscal adjustment programme on Tuesday afternoon was postponed until Wednesday.
Radio reports said the delay was due to "technical reasons" rather than any obstacles in the negotiations.