European stock index futures fell early on Monday as Greece's Syriza party promised to roll back austerity measures after sweeping to victory in a snap election.At 7:02 GMT, futures for Euro STOXX 50, for Germany's DAX and for France's CAC were down 0.6-1.0 percent.Greek leftist leader Alexis Tsipras promised on Sunday that five years of austerity and "humiliation and suffering" imposed by international creditors were over after his party's victory.