There's been some surprising results in the Champions League so far this season, such as BATE and Cluj getting results against Juve and Chelsea respectively. I'm not gonna count my chickens yet, but of course I'm going to expect nothing other than a United victory come Tuesday night, especially that being a home game.
Celtic are certainly not as good as previous seasons, where they have had such a good record in Parkhead. We United fans have generally not had much beef with the Bhoys, except for the fact that they sing You'll Never Walk Alone as their song too.
Here's an interesting fact, You'll Never Walk Alone was originally sang by United fans as a tribute to the Busby Babes who died in Munich.