| Date | Home | Away | Group | Result |
|---|---|---|---|---|
| 9/21/23 4:45 PM | Bayer 04 Leverkusen | BK Häcken | Group H | 4-0 |
| 9/21/23 4:45 PM | Qarabag | Molde FK | Group H | 1-0 |
| 9/21/23 4:45 PM | Sheriff Tiraspol | AS Roma | Group G | 1-2 |
| 9/21/23 4:45 PM | Servette FC Genève | Slavia Prag | Group G | 0-2 |
| 9/21/23 4:45 PM | Linzer ASK | Liverpool FC | Group E | 1-3 |
| 9/21/23 4:45 PM | Stade Rennes | Maccabi Haifa | Group F | 3-0 |
| 9/21/23 4:45 PM | Panathinaikos Athens | FC Villarreal | Group F | 2-0 |
| 9/21/23 4:55 PM | Royale Union Saint-Gilloise | FC Toulouse | Group E | 1-1 |
| 9/21/23 7:00 PM | West Ham United | TSC Backa Topola | Group A | 3-1 |
| 9/21/23 7:00 PM | Olympiakos Piräus | SC Freiburg | Group A | 2-3 |
| 9/21/23 7:00 PM | Ajax Amsterdam | Olympique Marseille | Group B | 3-3 |
| 9/21/23 7:00 PM | Brighton and Hove Albion | AEK Athens | Group B | 2-3 |
| 9/21/23 7:00 PM | Sparta Prag | Aris Limassol | Group C | 3-2 |
| 9/21/23 7:00 PM | Glasgow Rangers | Real Betis Sevilla | Group C | 1-0 |
| 9/21/23 7:00 PM | Atalanta Bergamo | KS Rakow Czestochowa | Group D | 2-0 |
| 9/21/23 7:00 PM | SK Sturm Graz | Sporting Lisbon | Group D | 1-2 |