The G8 leaders have stressed the importance of a "strong and cohesive" eurozone and reaffirmed their interest in Greece remaining a member while honouring its commitments commitments to tackle its deficit.
The summit host, President Barack Obama, emphasised the importance of countries being "absolutely committed" to restoring stability and economic growth while repairing their public finances.
Opening the main working session of the day, Mr Obama also made clear that the world was looking for a solution amid fears a disorderly Greek exit from the single currency could trigger another global financial collapse.
Speaking from Camp David, Prime Minister David Cameron said the eurozone nations needed to heed calls from around the world for "decisive action" to end the turmoil.
Mr Cameron refused to be drawn into criticising German Chancellor Angela Merkel for blocking a rescue package for the eurozone.
However, he indicated that he would like to see the European Central Bank do more to stimulate demand.
On Sunday the group moves on to the Nato summit in Chicago where the focus will be on Afghanistan as international forces move towards withdrawal by the end of 2014.