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| 1st(1st leg) | FK Žalgiris | - | Galatasaray | 2:2 (0:0) | ||
| 2nd (2nd leg) | Galatasaray | - | FK Žalgiris | 1:0 (1:0) | ||
| 1st(1st leg): 25/07/2023 17:00 | 2nd (2nd leg): 02/08/2023 19:30 | Winner: Galatasaray | ||||
| 1st(1st leg) | HJK Helsinki | - | Molde FK | 1:0 (1:0) | ||
| 2nd (2nd leg) | Molde FK | - | HJK Helsinki | 2:0 (0:0) | ||
| 1st(1st leg): 25/07/2023 17:00 | 2nd (2nd leg): 02/08/2023 18:00 | Winner: Molde FK | ||||
| 1st(1st leg) | Dinamo Zagreb | - | FK Astana | 4:0 (3:0) | ||
| 2nd (2nd leg) | FK Astana | - | Dinamo Zagreb | 0:2 (0:1) | ||
| 1st(1st leg): 25/07/2023 19:00 | 2nd (2nd leg): 02/08/2023 15:00 | Winner: Dinamo Zagreb | ||||
| 1st(1st leg) | SK Dnipro-1 | - | Panathinaikos | 1:3 (0:1) | ||
| 2nd (2nd leg) | Panathinaikos | - | SK Dnipro-1 | 2:2 (1:1) | ||
| 1st(1st leg): 25/07/2023 19:00 | 2nd (2nd leg): 01/08/2023 18:30 | Winner: Panathinaikos | ||||
| 1st(1st leg) | Servette FC | - | KRC Genk | 1:1 (0:1) | ||
| 2nd (2nd leg) | KRC Genk | - | Servette FC | 1:4 (1:1, 2:2, 2:2) pso | ||
| 1st(1st leg): 25/07/2023 19:30 | 2nd (2nd leg): 02/08/2023 18:00 | Winner: Servette FC | ||||
| 1st(1st leg) | Zrinjski Mostar | - | Slovan Bratislava | 0:1 (0:0) | ||
| 2nd (2nd leg) | Slovan Bratislava | - | Zrinjski Mostar | 2:2 (1:0) | ||
| 1st(1st leg): 25/07/2023 20:00 | 2nd (2nd leg): 01/08/2023 19:30 | Winner: Slovan Bratislava | ||||
| 1st(1st leg) | Breiðablik | - | FC København | 0:2 (0:2) | ||
| 2nd (2nd leg) | FC København | - | Breiðablik | 6:3 (4:1) | ||
| 1st(1st leg): 25/07/2023 20:15 | 2nd (2nd leg): 02/08/2023 19:00 | Winner: FC København | ||||
| 1st(1st leg) | FC Sheriff | - | Maccabi Haifa | 1:0 (1:0) | ||
| 2nd (2nd leg) | Maccabi Haifa | - | FC Sheriff | 4:1 (1:1, 2:1) aet | ||
| 1st(1st leg): 26/07/2023 18:00 | 2nd (2nd leg): 02/08/2023 18:00 | Winner: Maccabi Haifa | ||||
| 1st(1st leg) | Aris Limassol | - | BATE Borisov | 6:2 (3:0) | ||
| 2nd (2nd leg) | BATE Borisov | - | Aris Limassol | 3:5 (1:3) | ||
| 1st(1st leg): 26/07/2023 18:00 | 2nd (2nd leg): 01/08/2023 19:00 | Winner: Aris Limassol | ||||
| 1st(1st leg) | Raków Częstochowa | - | Qarabağ FK | 3:2 (0:0) | ||
| 2nd (2nd leg) | Qarabağ FK | - | Raków Częstochowa | 1:1 (0:0) | ||
| 1st(1st leg): 26/07/2023 19:15 | 2nd (2nd leg): 02/08/2023 17:00 | Winner: Raków Częstochowa | ||||
| 1st(1st leg) | PFC Ludogorets Razgrad | - | Olimpija Ljubljana | 1:1 (1:1) | ||
| 2nd (2nd leg) | Olimpija Ljubljana | - | PFC Ludogorets Razgrad | 2:1 (1:1) | ||
| 1st(1st leg): 26/07/2023 19:45 | 2nd (2nd leg): 01/08/2023 19:00 | Winner: Olimpija Ljubljana | ||||
| 1st(1st leg) | KÍ Klaksvík | - | BK Häcken | 0:0 (0:0) | ||
| 2nd (2nd leg) | BK Häcken | - | KÍ Klaksvík | 3:4 (1:1, 2:2, 3:3) pso | ||
| 1st(1st leg): 26/07/2023 19:45 | 2nd (2nd leg): 02/08/2023 18:00 | Winner: KÍ Klaksvík | ||||
