How will the round of 16 draw work. 1 pot group winners, 1 pot runners up, yet Liverpool can't play PSG or Man City so what happens if they are drawn together
It's pretty simple actually, because there are only two rules:
- Teams from the same group may not be drawn against each others.
- Teams from the same association may not be drawn against each others.
Liverpool played PSG in the group stage and City is from the same association, that's why those match-ups are not possible in the next round.
This is done as follows:
- All runners-up are placed in one bowl.
- All group winners have an own bowl each.
- When a runner-up is drawn an empty bowl will be filled with all possible group winners, eliminating the possibility to draw an ineligible opponent.
- When there's no need to draw (e.g. one eligible opponent left) the match will be placed directly.
- If the last match would become invalid the previous match is selected directly. This happened in the 2016 round of 16 draw.
A computer helps by showing any (in)eligible opponents when a runner-up is drawn.