Goldman Sachs faces the prospect of potential legal action from Greece over the complex financial deals in 2001 that many blame for its subsequent debt crisis.

A leading adviser to debt-riven countries has offered to help Athens recover some of the vast profits made by the investment bank.

The Independent has learnt that a former Goldman banker, who has advised indebted governments on recovering losses made from complex transactions with banks, has written to the Greek government to advise that it has a chance of clawing back some of the hundreds of millions of dollars it paid Goldman to secure its position in the single currency.

The development came as Greece edged towards a last-minute deal with its creditors which will keep it from crashing out of the single currency.