William R Rhodes, who was Senior Vice-Chairman of Citibank from 1991 to 2010, says if the EU wants Greece to stay in the euro they have to be realistic and allow the new government time to implement the austerity measures, tax reform and privatisation.
He told Zeinab Badawi that Germany had been a main beneficiary of the euro and it was in their interest to keep the eurozone together.
You can watch the full interview on BBC World News on Friday 22 June at 03:30, 08:30, 15:30 and 20:30 GMT and on the BBC News Channel on Friday 22 June at 00:30 and 04:30 BST.
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