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| H | Slavia Praha | - | Zorya Lugansk | 2:0 (0:0) | ||
| R | Zorya Lugansk | - | Slavia Praha | 2:1 (2:0) | ||
| H: 24.08.2023 19:00 | R: 31.08.2023 19:00 | Sieger: Slavia Praha | ||||
| H | BK Häcken | - | Aberdeen FC | 2:2 (1:0) | ||
| R | Aberdeen FC | - | BK Häcken | 1:3 (0:2) | ||
| H: 24.08.2023 19:00 | R: 31.08.2023 20:45 | Sieger: BK Häcken | ||||
| H | PFC Ludogorets Razgrad | - | AFC Ajax | 1:4 (0:3) | ||
| R | AFC Ajax | - | PFC Ludogorets Razgrad | 0:1 (0:0) | ||
| H: 24.08.2023 20:00 | R: 31.08.2023 20:00 | Sieger: AFC Ajax | ||||
| H | Olimpija Ljubljana | - | Qarabağ FK | 0:2 (0:2) | ||
| R | Qarabağ FK | - | Olimpija Ljubljana | 1:1 (1:1) | ||
| H: 24.08.2023 20:00 | R: 31.08.2023 18:00 | Sieger: Qarabağ FK | ||||
| H | Dinamo Zagreb | - | AC Sparta Praha | 3:1 (1:1) | ||
| R | AC Sparta Praha | - | Dinamo Zagreb | 4:1 (2:0) | ||
| H: 24.08.2023 20:00 | R: 31.08.2023 19:00 | Sieger: AC Sparta Praha | ||||
| H | Union Saint-Gilloise | - | FC Lugano | 2:0 (1:0) | ||
| R | FC Lugano | - | Union Saint-Gilloise | 0:1 (0:1) | ||
| H: 24.08.2023 20:30 | R: 31.08.2023 20:30 | Sieger: Union Saint-Gilloise | ||||
| H | Slovan Bratislava | - | Aris Limassol | 2:1 (1:0) | ||
| R | Aris Limassol | - | Slovan Bratislava | 6:2 (3:1) | ||
| H: 24.08.2023 20:30 | R: 31.08.2023 19:00 | Sieger: Aris Limassol | ||||
| H | KÍ Klaksvík | - | FC Sheriff | 1:1 (0:0) | ||
| R | FC Sheriff | - | KÍ Klaksvík | 2:1 (1:1) | ||
| H: 24.08.2023 20:45 | R: 31.08.2023 19:00 | Sieger: FC Sheriff | ||||
| H | Olympiakos Piraeus | - | FK Čukarički | 3:1 (3:0) | ||
| R | FK Čukarički | - | Olympiakos Piraeus | 0:3 (0:2) | ||
| H: 24.08.2023 21:00 | R: 31.08.2023 20:00 | Sieger: Olympiakos Piraeus | ||||
| H | LASK | - | Zrinjski Mostar | 2:1 (2:0) | ||
| R | Zrinjski Mostar | - | LASK | 1:1 (1:0) | ||
| H: 24.08.2023 21:00 | R: 31.08.2023 21:00 | Sieger: LASK | ||||
