The Olympiakos game going to extra time won't really have an effect our game with Liverpool considering you are our next game We play them the week after.
Having a bit of a break between games isn't always a good thing though as you can lose some momentum. Though saying that I can't remember any point in this season where we've had any momentum. Considering the way both Utd and Liverpool are playing at the moment... I would be more than happy with a draw.