Laursen was taken off soon after half-time at Craven Cottage, in his first start for four months. He will now undergo a scan to examine the extent of his injury. "It is hard to say how long he will be out,'' a frustrated Martin O'Neill said. "He felt it and beckoned over to the bench and we replaced him. That's the way it has been going for him. He plays a game, gets himself into a bit of a groove, and suddenly he is injured again. He was doing absolutely fine, then he got injured."