Huge rival rallies are expected in central Athens late Friday to galvanise support for each side in Sunday's plebiscite.
Many Greeks, who are struggling under capital controls that have limited daily ATM withdrawals to just 60 euros ($67), fear EU leaders' warnings that a 'No' vote could mean Greece's exit from the euro -- a Grexit.
The sense of building crisis was heightened further by a eurozone emergency fund officially declaring Greece to be in default.
Tsipras insisted that his decision to stop debt negotiations last week and call the referendum "does not mean a break with Europe".
He called on creditors to restructure Greek's unsustainable 323-billion-euro debt mountain by forgiving 30 per cent of the debt owed to them and allowing a 20-year grace period for repaying the rest.
Confusion is widespread over the very technical question posed in the referendum, compounding concerns over what the post-vote consequences might be.
An Alco institute poll found 44.8 per cent of Greeks intend to vote 'Yes' and 43.4 percent are for 'No'. A Bloomberg survey for Greece's Macedonia University was equally split, showing 43 percent to vote 'No' and 42.5 percent 'Yes'.
European Commission chief Jean-Claude Juncker warned that Greece's negotiating position, far from being strengthened, would be "dramatically weakened" in the event of a 'No'.
Even if the 'Yes' vote wins, there would still be "difficult" negotiations ahead, he added.
Greek voters are confronted with a referendum question that has stumped many.
Eurozone officials have firmly said that the "deal" referred to expired on Tuesday -- the same day Greece failed to make a 1.5-billion-euro payment to the IMF, becoming the first developed country ever to do so.
Some voters who initially backed the government have swapped sides ahead of Sunday's ballot.
You’ve reached your limit of {{free_limit}} free articles this month.
Subscribe now for unlimited access.
Already subscribed? Log in
Subscribe to read the full story →
Smart Quarterly
₹900
3 Months
₹300/Month
Smart Essential
₹2,700
1 Year
₹225/Month
Super Saver
₹3,900
2 Years
₹162/Month
Renews automatically, cancel anytime
Here’s what’s included in our digital subscription plans
Exclusive premium stories online
Over 30 premium stories daily, handpicked by our editors


Complimentary Access to The New York Times
News, Games, Cooking, Audio, Wirecutter & The Athletic
Business Standard Epaper
Digital replica of our daily newspaper — with options to read, save, and share


Curated Newsletters
Insights on markets, finance, politics, tech, and more delivered to your inbox
Market Analysis & Investment Insights
In-depth market analysis & insights with access to The Smart Investor


Archives
Repository of articles and publications dating back to 1997
Ad-free Reading
Uninterrupted reading experience with no advertisements


Seamless Access Across All Devices
Access Business Standard across devices — mobile, tablet, or PC, via web or app
