The theory is the "seeded" top half of the play-off teams will beat the "unseeded" lower half. So when it comes to us playing again, the teams in 15/16th will be the lowest finishing teams left. If we get into the QFs, the next matches for 1-2 will be the winners of the teams playing the 7th/8th positions, so we could be playing Freiburg or Roma (or whichever team beats them from Zagreb v Genk or Brann v Bolgna).
We will know our exact (and potential future) opponents next Friday at 1300 when the rest of the brackets are filled in.