Teams

Group stage

Atalanta BC

Real Betis Balompié

Brighton & Hove Albion FC

SC Freiburg

Bayer 04 Leverkusen

Liverpool FC

Stade Rennais FC

AS Roma

Sporting Clube de Portugal

Toulouse FC

Villarreal CF

West Ham United FC

Play-offs

Aberdeen FC

AFC Ajax

FK Cukaricki

FC Lugano

Union Saint-Gilliose

FC Zorya Luhansk

Third qualifying round

Olympiacos FC

SK Slavia Praha