The head of the International Monetary Fund (IMF), Christine Lagarde has denied reports the organisation is trying to force Greece to default on its debts.
Last week, Wikileaks published a transcript of IMF officials discussing the latest bailout deal, in which one claims a "crisis" could secure a deal. Following the leak, Greece demanded an explanation, suggesting the IMF was considering delaying negotiations until the government had no money left.
In a letter to Greek Prime Minister Alexis Tsipras, Ms Lagarde said: "The IMF conducts its negotiations in good faith, not by way of threats, and we do not communicate through leaks."
"In the interest of the Greek people, we need to bring these negotiations to a speedy conclusion," she wrote.
After pulling her negotiation team out of Athens, Ms Lagarde said she had allowed them to return, but admitted she was "concerned as to whether we can indeed achieve progress", following the leak of the transcript.
Writing to Mr Tsipras, Ms Lagarde said: "My view of the ongoing negotiations is that we are still a good distance away from having a coherent program that I can present to our Executive Board. I have on many occasions stressed that we can only support a program that is credible and based on realistic assumptions, and that delivers on its objective of setting Greece on a path of robust growth while gradually restoring debt sustainability."
The talks focus on a review of the mutlibillion dollar bailout provided to Greece by the IMF and European Union. Part of the agreement saw Greece sign up to a number of cost-cutting measures. The review assess the implementation of those reforms and the financial savings that have followed, with a view to unlocking further loans.