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| U | Royal Antwerp FC | - | AEK Athene | 1:0 (1:0) | ||
| R | AEK Athene | - | Royal Antwerp FC | 1:2 (0:0) | ||
| U: 22.08.2023 21:00 | R: 30.08.2023 21:00 | Winnaars: Royal Antwerp FC | ||||
| U | Raków Częstochowa | - | FC Kopenhagen | 0:1 (0:1) | ||
| R | FC Kopenhagen | - | Raków Częstochowa | 1:1 (1:0) | ||
| U: 22.08.2023 21:00 | R: 30.08.2023 21:00 | Winnaars: FC Kopenhagen | ||||
| U | Rangers FC | - | PSV | 2:2 (1:0) | ||
| R | PSV | - | Rangers FC | 5:1 (1:0) | ||
| U: 22.08.2023 21:00 | R: 30.08.2023 21:00 | Winnaars: PSV | ||||
| U | Maccabi Haifa | - | BSC Young Boys | 0:0 (0:0) | ||
| R | BSC Young Boys | - | Maccabi Haifa | 3:0 (2:0) | ||
| U: 23.08.2023 21:00 | R: 29.08.2023 21:00 | Winnaars: BSC Young Boys | ||||
| U | Molde FK | - | Galatasaray | 2:3 (1:2) | ||
| R | Galatasaray | - | Molde FK | 2:1 (1:0) | ||
| U: 23.08.2023 21:00 | R: 29.08.2023 21:00 | Winnaars: Galatasaray | ||||
| U | Sporting Braga | - | Panathinaikos | 2:1 (0:0) | ||
| R | Panathinaikos | - | Sporting Braga | 0:1 (0:0) | ||
| U: 23.08.2023 21:00 | R: 29.08.2023 21:00 | Winnaars: Sporting Braga | ||||
