By Tanya Agrawal
(Reuters) - U.S. stock index futures were lower on Wednesday after Greece's creditors rejected some proposals from the country and doubts returned if Athens will be able to avert defaulting on its loans.
* Greek Prime Minister Alexis Tsipras has attacked the stance of "certain" creditors as "strange" because they rejected proposals presented by Athens to bridge a budget gap, a government official said without referring to specific proposals or which of the three institutions Tsipras was blaming for the deadlock.
* Tsipras will meet the heads of the European Central Bank, the International Monetary Fund and the European Commission in Brussels before a meeting of euro zone finance ministers at 1300 p.m. ET.
* Greece needs fresh funds to avoid defaulting on a $1.8 billion debt repayment to the IMF on June 30.
* The U.S. Commerce Department is expected to release its final gross domestic product figure, showing the economy shrank 0.2 percent in the first quarter. Last month, the government
slashed its estimate to show GDP shrunk at a 0.7 percent annual rate instead of growing at 0.2 percent as it estimated earlier. The data is expected at 8:30 a.m. ET.
* Investors have been keeping a keen eye on economic data to see if the U.S. economy has recovered from a slow start at the beginning of the year. The Federal Reserve has said it remains data-dependent and expects to raise rates when it sees a sustained rebound in the economy.
* Netflix
* Lennar
* Ford Motor
Futures snapshot at 6:54 a.m. ET:
* S&P 500 e-minis
* Nasdaq 100 e-minis
* Dow e-minis <1YMc1> were down 53 points, or 0.29 percent, with 16,856 contracts changing hands.
(Editing by Don Sebastian)