- Liverpool - PSG: The answer is Liverpool to win again and finish it. They won without doing anything in the 1st leg already.
- Lille - Dortmund: Dortmund look unreliable and couldn't even win home. I'm going with Lille here.
In fact, you are everywhere with the favorites, not the most difficult choice

But I don't think it will be that simple, otherwise the safest bet on "team X qualifies" as an 8-way multi bet would be free money with good profit.
I have doubts about the games I quoted plus Real - Atletico. Here the favorites will have to sweat a lot to get through to the next round.