Pot 1: AC Milan (ITA), Arsenal (ENG), Atalanta (ITA), Athletic Club (ESP), Atletico Madrid* (ESP), Braga (POR), CSKA Moscow* (RUS), Dynamo Kiev (UKR), Lazio (ITA), Leipzig* (GER), Lokomotiv Moscow (RUS), Plzen (CZE), Salzburg (AUT), Sporting Lisbon* (POR), Villarreal (ESP), Zenit (RUS)
Pot 2: AEK Athens (GRE), Astana (KAZ), Celtic* (SCO), Red Star (SRB), Dortmund* (GER), FCSB (ROU), Kobenhavn (DEN), Ludogorets (BUL), Lyon (FRA), Marseille (FRA), Napoli* (ITA), Nice (FRA), Ostersund (SWE), Partizan (SRB), Real Sociedad (ESP), Spartak Moscow* (RUS)
* Transferred from UEFA Champions League
Matches for the first knock-out stage of the UEFA Europa League will be held on 15 and 22 February 2018. With Zenit playing the first leg away.
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