The Greek debt crisis has saved the German government some €100bn (£70bn; $109bn) in lower borrowing costs because investors have sought safety in German bonds, a study has found.

Even if Greece defaults on all its debt, Germany would still benefit, says the German IWH institute.

Greece is hoping to reach a third bailout agreement, worth up to €86bn, with its creditors this week.

Germany has funded €90bn so far and wants tough conditions for a new deal.