EU's Tusk held conference call on Greece on Monday - Tusk

BRUSSELS (Reuters) - European Council President Donald Tusk held a conference call on Monday to prepare for a euro zone summit on Greece on Tuesday, he said on Twitter. Tusk convened the call with European Central Bank President Mario Draghi, Eurogroup President Jeroen Dijsselbloem, European Commission President Jean-Claude Juncker and head of the European Stability Mechanism Klaus Regling. (Reporting by Robert-Jan Bartunek; editing by Julia Fioretti)