Greece is working to make a emergency eurozone summit on Monday a "success," the government said, amid a standoff between Athens and its creditors over reforms to unlock the final tranche of its international bailout and avoid default.

"We hope that the final negotiations take place at Europe's highest political level and we are working toward the success of this summit," Prime Minister Alexis Tsipras's office said in a statement on Friday.

EU President Donald Tusk called an emergency summit of the leaders of the 19 eurozone countries on Monday in Brussels as fears mount that Greece could default on its debts ahead of a crucial June 30 deadline.