Greece has been at the center of Europe's debt crisis. Greek Prime Minister Antonis Samaras, who will be meeting with eurozone officials throughout the week,is expected to push for a two-year extension of Greece's bailout program. That would give the government more time to implement difficult reforms and help get the nation's economy back on track.
Investors are also keeping tabs on the Federal Reserve.
The central bank will release minutes from its July meeting Wednesday afternoon. While the Fed didn't announce any further stimulus measures at its latest meeting, investors will look for clues about whether quantitative easing could be coming when chairman Ben Bernanke speaks at the Jackson Hole, Wyo., symposium at the end of the month.
U.S. stocks ended flat Monday, but remained close to 4-year highs.
Companies:Best Buy(BBY) reported earnings early Tuesday that fell far short of analyst expectations, sending the retailer's stock down 9% in premarket trading. Best Buy also cut its outlook and suspended its stock buyback plan.
The disappointing report comes after the company announced that it had reached an impasse with founder Richard Schulze in his attempt to buy its outstanding shares, and named Hubert Joly, the former head of Carlson Wagonlit Travel, as its new CEO.
Barnes & Noble(BKS) is expected to report a loss of 98 cents a share on $1.5 billion in revenue before the bell.
Dell(DELL) will report its quarterly results after the closing bell Tuesday. It is expected to post earnings of 45 cents a share on $14.65 billion in revenue.
Shares of Urban Outfitters(URBN) soared 16% after the retailer reported second-quarter earnings that beat analyst expectations late Monday, leading to multiple analyst upgrades.
Worst may not be over for Facebook
Shares of Facebook(FB) continued to slide early Tuesday, following news that one of the social networking site's first big investors sold most of his stake. Peter Thiel, who became a Facebook investor in 2004, sold 16.8 million shares in the IPO, netting $640 million.