Greece's ability to pay its debts faces a key test this week, and although a Greek government official insisted to CNBC that the country will make a major payment on Tuesday, there are doubts that the country will be able to honor future obligations.
On Tuesday, Greece must pay the International Monetary Fund (IMF) -- one of Greece's main creditors alongside euro zone lenders -- 744.9 million euro ($829.9 million). It's just one repayment in a long line due to creditors over the summer.
It comes as talks between Greece and euro zone finance ministers (the Eurogroup) have yet to reach a solution over disputed reforms -- such as cuts to the pension system and a more flexible labor market -- dashing hopes that Greece will receive its last tranche of bailout aid worth 7.2 billion euros.
However, a Greek government official told CNBC Monday that Greece would make Tuesday's repayment, and that some kind of deal with the Eurogroup could be announced later Monday.