Greece was likely to "have no place in the eurozone" if it voted "no" in Sunday's referendum on whether to accept the terms of continued international aid, the chair of the council of eurozone finance ministers warned on Thursday.
Addressing a Dutch parliamentary committee, Jeroen Dijsselbloem said Greek voters should not expect to get better terms from their creditors by voting "no" in the referendum.
Dijsselbloem said that while the offer on which Greeks were being asked to vote had expired, the referendum would show whether Greeks were prepared to make the painful sacrifices needed to stay in the currency bloc.
"One illusion must be swept from the table: that if the outcome is negative then everything can be renegotiated and you will end up with an easier and more attractive package," said Dijsselbloem, who is also Dutch finance minister.
Far-reaching austerity measures are needed to put the Greek economy back on track, he said.
"If people say they don't want that, there is not only no basis for a new programme, there is also no basis for Greece in the eurozone."
His remarks contradict those of Greek Prime Minister Alexis Tsipras, who said a "no" vote would force the Eurogroup and other lenders to come back with a more favourable offer.
Dijsselbloem told reporters the eurozone countries were still prepared to help Greece in the event of a "yes" vote.
"The future of Greece is in the hands of the Greek people," he said. "If the outcome is positive, then there is naturally, on the European side, the willingness to help Greece out of the gutter."