Greece's new government held talks with the leaders of the European Commission and European Central Bank (ECB) to renegotiate the terms of a €240bn bailout.
Greek Finance Minister Yanis Varoufakis said he had "fruitful talks" with ECB chief Mario Draghi in Frankfurt.
Varoufakis is keen to convince the ECB that Greece's debt payments could be linked to the performance of the economy - the more it grows the more interest Greece would pay - through the use of debt swaps.
Meanwhile, Greek Prime Minister Alexis Tsipras met Commission head Jean-Claude Juncker and European Council President Donald Tusk today in Brussels, as part of the new government's diplomatic offensive.
Juncker was expected to press Mr Tsipras for a "technical" extension of Greece's current deal.
The Greek leader is also scheduled to travel to meet French President Francois Hollande later in Paris.
Varoufakis’ visit to Frankfurt and the prime minister's meeting in Brussels were the latest in a series of European trips to reassure leaders about the plans of the new government elected on January 25 son a promise of writing off most of Greece's spiralling debt.
Greece's current programme of loans ends on February 28. A final €7.2bn is still to be negotiated, but the new government has already begun to roll back austerity measures.
Eurozone finance ministers are due to meet on February 11 to discuss Greece's debt proposals.