Austrian Chancellor Werner Faymann has expressed cautious optimism for a solution to the Greek crisis, in a statement on Friday.

"There is still no result, but the chance of agreement exists and this chance must be utilized seriously," he said in regard to the new last-minute proposals from Greece to secure a third bailout.

"The constructive forces must now be stronger than those that do not want a solution under any circumstances," Faymann added.

He said as the crisis also affects the poorest members of Greek society, there is an obligation to use this "last opportunity" constructively.