Some of Greece's biggest banks may have to shut and merge with their rivals, it has been claimed.
A European official told the Reuters news agency that Greece's four big banks - National Bank of Greece, Eurobank, Piraeus and Alpha Bank - could be reduced to just two.
European leaders are meeting on Sunday in a bid to strike a financial aid deal with Greece.
Greek Prime Minister Alexis Tsipras has said his country has made a "brave choice" after rejecting creditors bailout terms by voting 'No' in a crunch referendum tonight.
Tsipras who has led the 'No' campaign said the country will now go to the negotiating table with the goal of restoring its banking system and negotiating for "a plan of reforms".
The Greeks have voted to reject the austerity terms demanded by eurozone creditors - so, what happens next?
Greeks have voted to reject the terms of an international bailout, putting it on the brink of a eurozone exit.
Greece's controversial Finance Minister Yanis Varoufakis has released a defiant statement of resignation entitled 'Minister no more!'