Depends when matches are played and when draws take place.
Just checked. Only that of Q3 as both draws of Q3 and PO are held before Q3 and PO are played and after Q2 is played.
So, if we are unseeded in Q2 draw Plzen, beat them we still will have our own coeff of 21 for the Q3-draw.
If we in Q3 draw one of the top 2 seeds in the spreadsheet (now Benfica or Dynamo Kiev), beat them we will take their coeff and will be seeded in PO