I don't usually bet heavily on the Ch. League but some favourites seem quite ok this time so I may give it a go. My choices have already been mentioned so I am in agreement with everyone that has posted on these games.
Werder Bremen should beat Olympiakos.
The Greeks have a terrible away record at the Champions League. Furthermore they look like they can not control possesion and they will need loads of luck to avoid defeat in this one. Bremen scored 8 against Arminia, 3 will do it for me this time.
Sevilla also looks good based on what I've read above. I watched some of their last game against Zaragossa (Sevilla lost 2-0) but this one is a different story altogether and I find it hard to believe that they will not win against Slavia.
I will also consider handicap bets in these two games. I also consider Lyon but more info will be needed for this one.