Pot one is headlined by Bayer Leverkusen and also features Benfica, Juventus, AC Milan, Lyon, Marseille, AZ Alkmaar, Olympiakos and Real Sociedad.
Pot two includes Scottish champions Celtic alongside Ferencvaros, Viktoria Plzen, Union Saint-Gilloise, Dinamo Zagreb, Red Bull Salzburg, Sparta Prague, Rennes and Anderlecht.
Pot three contains the English trio of Crystal Palace, Bournemouth and Sunderland, as well as Celta Vigo, Sturm Graz, Lech Poznan, Celje, Jagiellonia Bialystok and Omonia.
Pot four features Portuguese second-tier side Torreense on their European debut, plus Hoffenheim, Besiktas, Hapoel Be’er Sheva, NEC Nijmegen, OFI Crete, Lillestrom, Aarat-Armenia and Levski Sofia.