Dortmund vs Real Madrid , I would not place any bet on Real Madrid cause last time they played in Champions in the Dortmund stadium Real was beaten 3-0 as far as I remember so playing on Real is not a good choice.
These 2 games are the best of this week in Champions League.
Manchester city to win against celtic seems a good pick and yeaaaa even for handicap lets do this.
Also it is necessary to bear in mind that Kevin De Bruyne will not play next month days, because injury. I'm not sure how much is needed against Celtic, but is certainly an important player City's team
Even without kevin de bruyne they could still win the game easily. Pep has officially won almost every official match since he has taken over manchester city , with or without kevin de bruyne there wont be too much different at all. He will find replacement for kevin de bruyne as what he has did for aguero