The updated debt sustainability analysis was sent to euro zone governments late on Monday, hours after Athens and its 18 partners agreed in principle to open negotiations on a third bailout programme of up to 86 billion euros in return for tougher austerity measures and structural reforms. “The dramatic deterioration in debt sustainability points to the need for debt relief on a scale that would need to go well beyond what has been under consideration to date – and what has been proposed by the ESM,” the IMF said, referring to the European Stability Mechanism bailout fund.