Greece's finance minister Euclid Tsakalotos he was "confident" that an upcoming eurozone meeting would reach a "good solution" on debt relief, whilst calling on creditors to end their "procrastination".

"We're looking for a good solution. We're not looking for a perfect solution. I'm confident we'll get a good solution," Tsakalotos said in reference to the upcoming meeting on June 15.

"The pressure is on all sides...don't procrastinate at the cost of the Greek economy," Tsakalotos said.

"We are getting close to the time when a decision needs to be taken," he added.

Greece's debt mountain stands at a towering 179 percent of annual output, the legacy of a crisis that brought panic to the markets and nearly forced the country out of the euro.

A deal granting Greece debt relief and labelling its debt sustainable - seen by Athens as essential to boost recovery - has been held up by disagreements between the International Monetary Fund and European creditors led by Germany on Greek fiscal targets.