The playoff draw is as per the below placings. So there's a draw to determine the two teams that play from the four positions. It doesn't matter if you've played before or are from the same country.
Game 1 17/18 v 15/16
Game 2 23/24 v 9/10
Game 3 21/22 v 11/12
Game 4 19/20 v 13/14
Game 5 20/19 v 14/13
Game 6 22/21 v 12/11
Game 7 24/23 v 10/9
Game 8 18/17 v 16/15
Last 16
The last 16 draw is then:
Winner of Playoff 1 v 1st/2nd
Winner of Playoff 2 v 7th/8th
Winner of Playoff 3 v 5th/6th
Winner of Playoff 4 v 3rd/4th
Winner of Playoff 5 v 4th/3rd
Winner of Playoff 6 v 6th/5th
Winner of Playoff 7 v 8th/7th
Winner of Playoff 8 v 2nd/1st
A slightly more clear version in terms of placing is:
We can go as high as 19th with a win and as low as 22nd I believe. That would mean a playoff against Feyenoord, Lille, Brest or Dortmund as things stand. Then a last 16 v Arsenal, Inter, Atletico or Milan.
- 1st/2nd vs 15th/16th/17th/18th
- 3rd/4th vs 13th/14th/19th/20th
- 5th/6th vs 11th/12th/21st/22nd
- 7th/8th vs 9th/10th/23rd/24th
Completely pointless to look at potential opponents right now as so much will change.
We just need to win and we'll go from there!
We can finish as low as 23rd:
- Have to beat Brugge, so go above them.
- We'll finish above at least 1 of PSG-Stuttgart if we win.
Every other scenario isn't forced.
The only route we can't go down is:
1st/2nd v 15th/16th/17th/18th
Because as you rightly say 19th is the highest we can finish.
