| Date | Home | Away | Group | Result |
|---|---|---|---|---|
| 03/10/23 17:45 | FC Red Bull Salzburg | Real Sociedad | Group D | 0-2 |
| 03/10/23 17:45 | 1. FC Union Berlin | Sporting Braga | Group C | 2-3 |
| 03/10/23 20:00 | Inter Milan | Benfica Lisbon | Group D | 1-0 |
| 03/10/23 20:00 | SSC Napoli | Real Madrid | Group C | 2-3 |
| 03/10/23 20:00 | PSV Eindhoven | FC Sevilla | Group B | 2-2 |
| 03/10/23 20:00 | RC Lens | Arsenal FC | Group B | 2-1 |
| 03/10/23 20:00 | FC Copenhagen | FC Bayern Munich | Group A | 1-2 |
| 03/10/23 20:00 | Manchester United | Galatasaray Istanbul | Group A | 2-3 |
| 04/10/23 17:45 | Royal Antwerp FC | Schachtjor Donezk | Group H | 2-3 |
| 04/10/23 17:45 | Atletico Madrid | Feyenoord Rotterdam | Group E | 3-2 |
| 04/10/23 20:00 | FC Porto | FC Barcelona | Group H | 0-1 |
| 04/10/23 20:00 | RB Leipzig | Manchester City | Group G | 1-3 |
| 04/10/23 20:00 | Red Star Belgrad | Young Boys Bern | Group G | 2-2 |
| 04/10/23 20:00 | Newcastle United | Paris St. Germain | Group F | 4-1 |
| 04/10/23 20:00 | Borussia Dortmund | AC Milan | Group F | 0-0 |
| 04/10/23 20:00 | Celtic Glasgow | Lazio Rom | Group E | 1-2 |