Greece expects to receive another tranche of aid on schedule in September despite a dispute with international lenders Athens had fallen behind schedule in cutting its deficit.
Global growth in services came to a virtual standstill last month as new business all but dried up, adding to fears the world economy is facing another recession.
nvestors are closely watching the data out of Europe, including revised Gross Domestic Product (GDP) for the second quarter and Germany's industrial orders in July.
European stocks tumbled 4 percent on Monday, as fears for the future of the euro zone bubbled up against a background of weak economic growth and threats to the banking sector. Wall Street was closed for a public holiday.
The euro wallowed at one-month lows against the greenback in Asia on Tuesday, while commodity currencies nursed heavy losses as concerns about the health of the global economy prompted investors to dump riskier assets.