The G20 leaders are set to prolong their talks on Friday as they seek to find a sustainable solution to the euro zone debt crisis.
They are expected to converse ways to increase the firepower of the International Monetary Fund (IMF).
The hope is that increased resources will help the IMF to support struggling eurozone economies, such as Greece.
There have also been calls for a "financial firewall" to protect vulnerable economies such as Italy.
The US President, Barack Obama, said on Thursday that resolving the eurozone debt crisis was "the most important aspect of our task over the next two days".