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| 1st(1st leg) | Spartak Trnava | - | SK Dnipro-1 | 1:1 (0:0) | ||
| 2nd (2nd leg) | SK Dnipro-1 | - | Spartak Trnava | 1:2 (0:1, 1:1) aet | ||
| 1st(1st leg): 23/08/2023 17:30 | 2nd (2nd leg): 31/08/2023 19:00 | Winner: Spartak Trnava | ||||
| 1st(1st leg) | Hibernian FC | - | Aston Villa | 0:5 (0:3) | ||
| 2nd (2nd leg) | Aston Villa | - | Hibernian FC | 3:0 (2:0) | ||
| 1st(1st leg): 23/08/2023 17:45 | 2nd (2nd leg): 31/08/2023 20:00 | Winner: Aston Villa | ||||
| 1st(1st leg) | Tobyl Kostanay | - | Viktoria Plzeň | 1:2 (0:0) | ||
| 2nd (2nd leg) | Viktoria Plzeň | - | Tobyl Kostanay | 3:0 (1:0) | ||
| 1st(1st leg): 24/08/2023 15:00 | 2nd (2nd leg): 31/08/2023 18:00 | Winner: Viktoria Plzeň | ||||
| 1st(1st leg) | FK Astana | - | FK Partizani | 1:0 (1:0) | ||
| 2nd (2nd leg) | FK Partizani | - | FK Astana | 1:1 (1:0) | ||
| 1st(1st leg): 24/08/2023 15:00 | 2nd (2nd leg): 31/08/2023 19:00 | Winner: FK Astana | ||||
| 1st(1st leg) | FC Struga | - | Breiðablik | 0:1 (0:1) | ||
| 2nd (2nd leg) | Breiðablik | - | FC Struga | 1:0 (1:0) | ||
| 1st(1st leg): 24/08/2023 16:00 | 2nd (2nd leg): 31/08/2023 17:45 | Winner: Breiðablik | ||||
| 1st(1st leg) | FK Žalgiris | - | Ferencvárosi TC | 0:4 (0:1) | ||
| 2nd (2nd leg) | Ferencvárosi TC | - | FK Žalgiris | 3:0 (2:0) | ||
| 1st(1st leg): 24/08/2023 17:00 | 2nd (2nd leg): 31/08/2023 19:00 | Winner: Ferencvárosi TC | ||||
| 1st(1st leg) | FC Nordsjælland | - | Partizan | 5:0 (2:0) | ||
| 2nd (2nd leg) | Partizan | - | FC Nordsjælland | 0:1 (0:1) | ||
| 1st(1st leg): 24/08/2023 17:30 | 2nd (2nd leg): 31/08/2023 20:00 | Winner: FC Nordsjælland | ||||
| 1st(1st leg) | Levski Sofia | - | Eintracht Frankfurt | 1:1 (0:1) | ||
| 2nd (2nd leg) | Eintracht Frankfurt | - | Levski Sofia | 2:0 (0:0) | ||
| 1st(1st leg): 24/08/2023 18:00 | 2nd (2nd leg): 31/08/2023 19:30 | Winner: Eintracht Frankfurt | ||||
| 1st(1st leg) | Sepsi OSK | - | FK Bodø/Glimt | 2:2 (0:1) | ||
| 2nd (2nd leg) | FK Bodø/Glimt | - | Sepsi OSK | 3:2 (2:1, 2:2) aet | ||
| 1st(1st leg): 24/08/2023 18:00 | 2nd (2nd leg): 31/08/2023 17:00 | Winner: FK Bodø/Glimt | ||||
| 1st(1st leg) | Fenerbahçe | - | FC Twente | 5:1 (1:1) | ||
| 2nd (2nd leg) | FC Twente | - | Fenerbahçe | 0:1 (0:0) | ||
| 1st(1st leg): 24/08/2023 18:00 | 2nd (2nd leg): 31/08/2023 18:00 | Winner: Fenerbahçe | ||||
| 1st(1st leg) | Dinamo Kiev | - | Beşiktaş | 2:3 (0:1) | ||
| 2nd (2nd leg) | Beşiktaş | - | Dinamo Kiev | 1:0 (0:0) | ||
| 1st(1st leg): 24/08/2023 18:00 | 2nd (2nd leg): 31/08/2023 19:00 | Winner: Beşiktaş | ||||
| 1st(1st leg) | Rapid Wien | - | ACF Fiorentina | 1:0 (1:0) | ||
| 2nd (2nd leg) | ACF Fiorentina | - | Rapid Wien | 2:0 (0:0) | ||
| 1st(1st leg): 24/08/2023 18:00 | 2nd (2nd leg): 31/08/2023 19:00 | Winner: ACF Fiorentina | ||||
| 1st(1st leg) | Maccabi Tel Aviv | - | NK Celje | 4:1 (1:1) | ||
| 2nd (2nd leg) | NK Celje | - | Maccabi Tel Aviv | 1:1 (1:0) | ||
| 1st(1st leg): 24/08/2023 18:00 | 2nd (2nd leg): 31/08/2023 19:00 | Winner: Maccabi Tel Aviv | ||||
| 1st(1st leg) | Farul Constanța | - | HJK Helsinki | 2:1 (0:0) | ||
| 2nd (2nd leg) | HJK Helsinki | - | Farul Constanța | 2:0 (1:0) | ||
| 1st(1st leg): 24/08/2023 18:00 | 2nd (2nd leg): 31/08/2023 17:00 | Winner: HJK Helsinki | ||||
| 1st(1st leg) | KAA Gent | - | APOEL Nikosia | 2:0 (0:0) | ||
| 2nd (2nd leg) | APOEL Nikosia | - | KAA Gent | 1:2 (0:1) | ||
| 1st(1st leg): 24/08/2023 19:00 | 2nd (2nd leg): 31/08/2023 18:00 | Winner: KAA Gent | ||||
| 1st(1st leg) | FC Midtjylland | - | Legia Warszawa | 3:3 (2:1) | ||
| 2nd (2nd leg) | Legia Warszawa | - | FC Midtjylland | 6:5 (0:0, 1:1, 1:1) pso | ||
| 1st(1st leg): 24/08/2023 19:00 | 2nd (2nd leg): 31/08/2023 20:00 | Winner: Legia Warszawa | ||||
| 1st(1st leg) | Lille OSC | - | HNK Rijeka | 2:1 (1:1) | ||
| 2nd (2nd leg) | HNK Rijeka | - | Lille OSC | 1:1 (0:0, 1:0) aet | ||
| 1st(1st leg): 24/08/2023 19:00 | 2nd (2nd leg): 31/08/2023 19:15 | Winner: Lille OSC | ||||
| 1st(1st leg) | KRC Genk | - | Adana Demirspor | 2:1 (0:0) | ||
| 2nd (2nd leg) | Adana Demirspor | - | KRC Genk | 4:5 (1:0, 1:0, 1:0) pso | ||
| 1st(1st leg): 24/08/2023 19:00 | 2nd (2nd leg): 31/08/2023 19:00 | Winner: KRC Genk | ||||
| 1st(1st leg) | CA Osasuna | - | Club Brugge KV | 1:2 (0:0) | ||
| 2nd (2nd leg) | Club Brugge KV | - | CA Osasuna | 2:2 (0:1) | ||
| 1st(1st leg): 24/08/2023 19:30 | 2nd (2nd leg): 31/08/2023 19:30 | Winner: Club Brugge KV | ||||
| 1st(1st leg) | AZ Alkmaar | - | SK Brann | 1:1 (0:0) | ||
| 2nd (2nd leg) | SK Brann | - | AZ Alkmaar | 5:6 (1:2, 3:3, 3:3) pso | ||
| 1st(1st leg): 24/08/2023 19:45 | 2nd (2nd leg): 31/08/2023 18:00 | Winner: AZ Alkmaar | ||||
| 1st(1st leg) | Heart of Midlothian | - | PAOK Saloniki | 1:2 (1:1) | ||
| 2nd (2nd leg) | PAOK Saloniki | - | Heart of Midlothian | 4:0 (2:0) | ||
| 1st(1st leg): 24/08/2023 19:45 | 2nd (2nd leg): 31/08/2023 18:30 | Winner: PAOK Saloniki | ||||
| 1st(1st leg) | KF Ballkani | - | BATE Borisov | 4:1 (1:1) | ||
| 2nd (2nd leg) | BATE Borisov | - | KF Ballkani | 1:0 (1:0) | ||
| 1st(1st leg): 24/08/2023 19:45 | 2nd (2nd leg): 31/08/2023 19:00 | Winner: KF Ballkani | ||||
