3-5-2 flat.

4-5-1V is not necessary. you only need 3DC since he is not playing with wingers.
that frees up a defender to move up to an AMC or ST.

try 3N-1-3W-2N-1, up the middle or

3N-1-3W-0-3 ( I like this one)

I wouldnt worry about the first game. I lost my first game in the CL a few days ago, 1-0 away, but won the return leg 4-1.

Go with any of the above formations that gives you the strongest team.