Europe seen higher; Greece under pressure

European equities are expected to open higher on Tuesday as markets re-open after the long Easter weekend and investors focus on Greece and oil markets.

Greece is expected to return to market focus after the long Easter weekend after the country pledged to meet all its obligations to creditors. Greek Finance Minister Yanis Varoufakis said on Sunday that Greece "intends to meet all obligations to all its creditors, ad infinitum," Reuters reported Monday.

Greece has a 450 million euro ($494 million) loan repayment to one of its creditors, the International Monetary Fund, this Thursday, and doubts have grown that the county can meet its loan repayment obligations.

U.S. official Nathan Sheets, the Treasury's undersecretary for international affairs, has urged Greece to "fully commit" to technical negotiations so that it can finalize economic reforms needed to unlock further bailout funds, Reuters reported Monday.

Meanwhile in Asia, equities were higher Tuesday tracking an inspiring lead from Wall Street.

Australia's stock market trimmed some of its earlier gains after the Reserve Bank of Australia surprised markets by keeping interest rates on hold despite plunging iron ore prices - the country's biggest export.

Investors are also keeping an eye on oil markets Tuesday after oil futures dipped after a report from Goldman Sachs said production growth will remain too strong for substantial gains in the oil price.

Final composite PMI data for the euro zone is due at 9 a.m. GMT and earnings are due from Moncler and Sberbank.

- CNBC's See Kit Tang contributed to this market report.