By virtue of winning the La Liga title on Sunday, Real Madrid secured the final seed for next season's Champions League group stage.
Juventus will also remain in Pot 1 after winning a sixth consecutive Scudetto earlier in the day.
Bayern Munich, Benfica, Chelsea, Monaco, and Spartak Moscow all obtained priority status for the 2017-18 competition as the remaining champions of the top-seven European nations.
Ukrainian table-topper Shakhtar Donetsk snuck into Pot 1 because the Champions League holder, either Madrid or Juventus, will not require a spot.
Pot 2 will feature another strong selection of teams, with league runners-up Barcelona and Paris Saint-Germain placed in the same group as Atletico Madrid, Borussia Dortmund, Manchester City, and Porto.
Should Manchester United win the Europa League next week, it would also claim a place in Pot 2, according to ESPN FC's Dale Johnson. Sevilla could round it out if it successfully navigates the Champions League qualifying round as La Liga's fourth-placed finisher.
The picture for Pot 3 and Pot 4 will grow clearer once qualifying is concluded. At the moment, Johnson counts Liverpool, Anderlecht, Tottenham, and FC Basel as sure bets to fill Pot 3.