This is the business end of the league and in my opinion, O'Neill has consistently failed to best the top managers around this period. Although I agree that his teams have lots of spirit and can cause upsets (mainly to Liverpool when he was managing Leicester!), the point I wnated to demonstrate is that in the CL, he'd be coming up against the likes of Anchelotti on a regular basis and will have no clue to to set his team up.