ATHENS, Ramadan 16, 1436, Jul 3, 2015, SPA -- Prime Minister Alexis Tsipras rejected European warnings that Greeks will be deciding on their future in the euro zone in a referendum on Sunday, saying negotiations would continue for a better deal with international creditors after the vote, Reuters reported. In a televised address on Friday, Tsipras said a report by the International Monetary Fund which arguing that Greece's massive public debt could not be sustained without significant writedowns vindicated his advice to reject the lenders' terms. Repeating his assault on European partners he accused of blackmailing and issuing ultimatums to Greece, the leftist leader called for calm ahead of Sunday's ballot, as two opinion polls showed the 'Yes' and 'No' camps neck-and-neck. "On Sunday what is at stake is not Greece's membership of Europe, what is at stake is whether blackmail will lead us to accept the continuation of a policy which the lenders themselves recognise is a dead end," he said. --SPA 20:29 LOCAL TIME 17:29 GMT www.spa.gov.sa/w