Greece has "basically achieved" the goals of the reforms required by its international creditors, European Commission President Jean-Claude Juncker says.

"We are now at the time of the first review of the program (to aid Greece) and the objectives have been basically achieved," Juncker said in an interview published in the German daily Funke Mediengruppe on Sunday.

The Eurogroup, comprised of the 19 eurozone finance ministers, is scheduled to meet in Brussels on Monday to take up the review of reforms in Greece.

Athens hopes that the meeting will unlock the next tranche of its 86-billion-euro (95-billion-dollar) bailout agreed in July 2015.

The rescue package was offered by the European Commission, the European Central Bank (ECB) and the International Monetary Fund (IMF), the troika of Greece’s international lenders.

Juncker also said the ministers will begin “discussions about how to make Greece's debt sustainable in the long term.”

Endorsement of the reforms is necessary before any consideration of Greek debt relief, but despite lengthy talks, Athens’ reforms have yet to win the support of all its creditors mainly because of differences between the EU and the IMF, which has demanded more reforms.