Greece's new left-wing finance minister says his government will not negotiate over the Greek bailout conditions with the "troika" team from the EU and IMF.
Yanis Varoufakis said he was rather seeking direct talks with eurozone leaders, to try to cancel more than half the money Greece owes.
He was speaking after meeting Jeroen Dijsselbloem, head of the eurozone group of finance ministers, in Athens.
Mr Dijsselbloem said Greece should stick to its reform commitments.
He said Greece and the Eurogroup had a "mutual interest in the further recovery of the Greek economy inside the eurozone" and warned against Athens acting unilaterally in its efforts to renegotiate its bailout.
Greece has endured tough budget cuts in return for its €240bn (£179bn; $270bn) bailout, agreed in 2010 with the "troika" - the European Commission, International Monetary Fund (IMF) and European Central Bank (ECB).
In Berlin, German Finance Minister Wolfgang Schaeuble said the Greeks should abide by their commitments, adding: "There's no arguing with us about this and, what's more, we are difficult to blackmail."