The International Monetary Fund (IMF) thinks Greece's international lenders will have to increase the size of a third bailout to 90 billion euros (63.55 billion pounds), Germany's Handelsblatt reported on Monday. The economy is expected to shrink by between 2.1 and 2.3 percent this year, a Greek government official told Reuters on Monday. Greece and its international creditors are currently putting the final touches to a multi-billion euro bailout to keep the debt-stricken nation financially afloat and meet an important debt repayment to the European Central Bank within days.