Häcken (SWE) vs The New Saints (WAL)Ballkani (KOS) vs Ludogorets (BUL)
Shamrock Rovers (IRL) vs Winners of preliminary round
Žalgiris Vilnius (LTU) vs Struga (MKD)
KÍ Klaksvík (FRO) vs Ferencváros (HUN)
Olimpija Ljubljana (SVN) vs Valmiera (LVA)
HJK Helsinki (FIN) vs Larne (NIR)
Lincoln Red Imps (GIB) vs Qarabağ (AZE) *
Raków Czestochowa (POL) vs Flora Tallinn (EST) *
Slovan Bratislava (SVK) vs Swift Hesper (LUX)
Farul Constanța (ROU) vs Sheriff Tiraspol (MDA)
Hamrun Spartans (MLT) vs Maccabi Haifa (ISR)
Urartu (ARM) vs Zrinjski (BIH)
Partizani (ALB) vs BATE Borisov (BLR)
Astana (KAZ) vs Dinamo Tbilisi (GEO)