Another controversial disallowed goal for the United States left the Americans and Algeria tied at 0-0 at half-time of Wednesday's crucial World Cup match, each desperate for a victory to advance. Slovenia lead Group C on four points with the Americans and England level on two points after a pair of draws and Algeria on one point, the North African side still having a chance to advance with a victory. Already smarting from a disallowed goal late in a 2-2 draw with Slovenia last week, the Americans were stung by another questionable decision in the 20th minute against Algeria. Herculez Gomez, starting in place of suspended US forward Robbie Findley, recovered his own rebound on a blocked shot and slid the ball across the front of the net to Clint Dempsey, who put the ball in the back of the net. But the offside flag was up, although television replays appeared to show Dempsey onside. Jozey Altidore was guilty of a dreadful miss in the 37th minute, when Algerian goalkeeper Rais Bolhi's deflection of a Landon Donovan shot fell to him, but he could only blast it high over the bar. It was by no means all one way traffic with the Algerians going close on several occasions in an entertaining encounter given there is so much at stake. 