Francois Hollande piles pressure on Greek PM Samaras
French President Francois Hollande has urged Greece to prove it can pass reforms demanded by international creditors, after talks with Greek leader Antonis Samaras.
Mr Samaras has been appealing for more time to introduce the reforms.
But Mr Hollande said no further decision could be taken until European ministers consider a major report on Greece's finances, due in September.
Donors including the EU insist Greece has to make major spending cuts.
These are needed if Greece is to secure the next tranche of its bailout.
The BBC's Mark Lowen in Athens says the Greek government is under pressure to win concessions from Europe to placate the tired nation and lessen the likelihood of a destabilising period of social unrest.
Mr Samaras is seeking an extension of up to two years for the necessary reforms, in order to provide Greece with the growth needed to improve its public finances.
In talks with German Chancellor Angela Merkel earlier this week, he was told that the decision would depend on a report from the so-called troika - the International Monetary Fund (IMF), the European Central Bank (ECB) and the European Commission.
Mr Hollande also said Europe needed to consider the report before it could make any further decisions on Greece.
He said decisions on whether to grant Greece more time should be taken when European finance ministers meet in early October.
"We've been facing this question for two and a half years, there's no time to lose, there are commitments to reaffirm on both sides, decisions to take, and the sooner the better," he said.
Greece's continued access to the bailout packages depends on a favourable report from the troika.
Athens is trying to finalise a package of 11.5bn euros ($14.4bn; £9.1bn) of spending cuts over the next two years.
It is also being asked to put in place economic and structural reforms, including changes to the labour market and a renewed privatisation drive.
The measures are needed to qualify for the next 33.5bn-euro instalment of its second 130bn-euro bailout.
Greece needs the funds to make repayments on its debt burden. A default could result in the country leaving the euro.