File photo of German Chancellor Merkel and Greek Prime Minister Tsipras leaving after addressing news conference in Berlin

German Chancellor Angela Merkel and Greek Prime Minister Alexis Tsipras leave after addressing a news conference following talks at the Chancellery in Berlin in this March 23, 2015 file photo. To match Insight EUROZONE-GREECE/GERMANY-BLAME
REUTERS/Hannibal Hanschke/Files