The International Monetary Fund is carefully monitoring the situation in Greece and neighboring countries, and is ready to provide assistance "as needed" in the unfolding financial crisis, Managing Director Christine Lagarde said Sunday.

"The coming days will clearly be important," Lagarde said in a statement, expressing disappointment that talks broke down between Athens and its creditors but noting she believed the eurozone was in a "strong position" to respond to the crisis.

"The IMF also will continue to carefully monitor developments in Greece and other countries in the vicinity and stands ready to provide assistance as needed."