It was close that Milan would not make it to the group stage, but after 24 (!) Penalties against Portuguese Rio Ave, they finally won in the playoffs.
Alexander Isaks Real Sociedad is in a tough group with Italian Napoli, AZ Alkmaar with Jespar Karlsson and Croatian Rijeka.
Here are the groups:
Group A: Roma, Young Boys, Cluj, CSKA Sofia.
Group B: Arsenal, Rapid Wien, Molde, Dundalk.
Group C: Bayer Leverkusen, Slavia Prague, Hapoel Beer Sheva, Nice.
Group D: Benfica, Standard Liège, Rangers, Lech Poznan.
Group E: PSV Eindhoven, Paok Thessaloniki, Granada, Omonoia Nicosia,
Group F: Napoli, Real Sociedad, AZ Alkmaar, Rijeka.
Group G: Braga, Leicester, AEK Athens, Zorja Luhansk,
Group H: Celtic, Sparta Prague, Milan, Lille.
Group I: Villarreal, Karabach, Maccabi Tel Aviv, Sivasspor.
Group J: Tottenham, Ludogorets Razgrad, Lask Linz, Antwerp.
Group K: CSKA Moscow, Dinamo Zagreb, Feyenoord, Wolfsberg.
Group L: Ghent, Red Star, Hoffenheim, Slovan Liberec.