US STOCKS-Futures point to slight dip at the open
* S&P on track for flat week, Nasdaq up for 7 sessions
* Investors look for signs of progress with Greece deal
* Deere & Co falls in premarket after results
* Futures down: Dow 23 pts, S&P 3.5 pts, Nasdaq 0.5 pt (Updates trading)
By Ryan Vlastelica
NEW YORK, Feb 20 (Reuters) - U.S. stock index futures pointed to slight losses at the open on Friday amid uncertainty over ongoing negotiations for a debt deal in Greece.
While the start of an emergency meeting of the 19-nation Eurogroup in Brussels was postponed to allow more time for preparatory talks, the new prime minister of Greece said he was certain that euro zone finance ministers would accept Athens' request for an extended loan.
In a positive sign, Germany seemed to soften its tone after earlier this week rejecting Greece's proposal for a loan extension, saying it fell short of conditions set by the country's euro zone partners.
However, Maltese Finance Minister Edward Scicluna told the weekly Malta Today that the EU's biggest countries may be prepared to let Greece leave the euro zone. Continuación...