Mm, UCL predictions:
Celtic - Barcelona
Celtic are obvious underdogs here, I'd like to see them make it through but I doubt it. Celtic have great home form, but getting anything away, that'll be tough.
Lyon - Manchester United
I just think Man U have more quality. As SBC stated above as well, Man U have fantastic home form.
Schalke 04 - Porto
I'm unfamiliar with both of these teams, so making this prediction on Group Stage statastical form. Porto: 3 Ws, 2 Ds and 1 Ls. Schalke 04: 2 Ws, 2 Ds, 2 Ls. Porto are also undefeated (in the UCL) at home.
Liverpool - Internazionale
Form says Inter, but I have a hard time betting against Liverpool in UCL games. The UCL just seems to be the tournament where they shine.
Roma - Real Madrid
Not overly familiar with these two teams, but I'd put my bets on Madrid, for obvious reasons.
Arsenal - AC Milan
Going with the Defending champs. At home, I reckon Arsenal are okay, but whether they can go away and get anything (or keep themselves from losing any lead they have) I don't know.
Olympiacos - Chelsea
Chelsea are a great team if they have their key players fit. If they have their main squad fit, I'd certainly list Olympiacos as underdogs.
Fenerbahçe - Sevilla
As with a couple of the above, I'm not overly familiar with both teams, but on current form, Sevilla have 5 wins from 6 (with their only loss away to Arsenal), whilst Fenerbahçe carry 3 wins and 2 draws from 6.