A day ahead of a crucial emergency eurozone summit, European leaders renewed efforts to reach a deal between Greece and its creditors that would allow the debt-ridden country to avoid a default and a potentially disastrous exit from the euro. Greek Prime Minister Alexis Tsipras had separate telephone conversations Sunday with French President Francois Hollande, German Chancellor Angela Merkel and European Commission President Jean-Claude Juncker, the prime minister's press office said. The press office statement said that Tsipras "presented to the three leaders Greece's proposal for a mutually beneficial agreement, which will provide a permanent solution and not just postpone tackling the problem>'