Group stage schedule
| Matchday | Date | Matches |
|---|---|---|
| Matchday 1 | 19 September 2019 | 2 v 3, 4 v 1 |
| Matchday 2 | 3 October 2019 | 1 v 2, 3 v 4 |
| Matchday 3 | 24 October 2019 | 3 v 1, 2 v 4 |
| Matchday 4 | 6–7 November 2019 | 1 v 3, 4 v 2 |
| Matchday 5 | 27–28 November 2019 | 3 v 2, 1 v 4 |
| Matchday 6 | 12 December 2019 | 2 v 1, 4 v 3 |
Groups Fixture
Groupe A
| Team | Pld. | W | D | L | Goals | Pts. | Qualf. |
| Sevilla | 6 | 5 | 0 | 1 | 14-3 | 15 | Play off |
| APOEL | 6 | 3 | 1 | 2 | 10-8 | 10 | Play off |
| Qarabag | 6 | 1 | 2 | 3 | 8-11 | 5 | |
| Dudelange | 6 | 1 | 1 | 4 | 8-18 | 4 |
Groupe C
| Team | Pld. | W | D | L | Goals | Pts. | Qualf. |
| FC Basel | 6 | 4 | 1 | 1 | 11-4 | 13 | Play off |
| Getafe | 6 | 4 | 0 | 2 | 8-4 | 12 | Play off |
| Krasnodar | 6 | 3 | 0 | 3 | 7-11 | 9 | |
| Trabzonspor | 6 | 0 | 1 | 5 | 3-11 | 1 |
Groupe E
| Team | Pld. | W | D | L | Goals | Pts. | Qualf. |
| Celtic | 6 | 4 | 1 | 1 | 10-6 | 13 | Play off |
| CFR Cluj | 6 | 4 | 0 | 2 | 6-4 | 12 | Play off |
| Lazio | 6 | 2 | 0 | 4 | 6-9 | 6 | |
| Rennes | 6 | 1 | 1 | 4 | 5-8 | 4 |
Groupe G
| Team | Pld. | W | D | L | Goals | Pts. | Qualf. |
| FC Porto | 6 | 3 | 1 | 2 | 8-9 | 10 | Play off |
| FC Rangers | 6 | 2 | 3 | 1 | 8-6 | 9 | Play off |
| Young Boys | 6 | 2 | 2 | 2 | 8-7 | 8 | |
| Feyenoord | 6 | 1 | 2 | 3 | 7-9 | 5 |
Groupe I
| Team | Pld. | W | D | L | Goals | Pts. | Qualf. |
| AA Gent | 6 | 3 | 3 | 0 | 11-7 | 12 | Play off |
| WFL Wolfsburg | 6 | 3 | 2 | 1 | 9-7 | 11 | Play off |
| Saint Etienne | 6 | 0 | 4 | 2 | 6-8 | 4 | |
| Oleksandriya | 6 | 0 | 3 | 3 | 6-10 | 3 |
Groupe K
Groupe B
| Team | Pld. | W | D | L | Goals | Pts. | Qualf. |
| Malmö FF | 6 | 3 | 2 | 1 | 8-6 | 11 | Play off |
| FC Copenhagen | 6 | 2 | 3 | 1 | 5-4 | 9 | Play off |
| Dynamo Kyiv | 6 | 1 | 4 | 1 | 7-7 | 7 | |
| Lugano | 6 | 0 | 3 | 3 | 2-5 | 3 |
Groupe D
| Team | Pld. | W | D | L | Goals | Pts. | Qualf. |
| LASK Linz | 6 | 4 | 1 | 1 | 11-4 | 13 | Play off |
| Sporting CP | 6 | 4 | 0 | 2 | 11-7 | 12 | Play off |
| PSV | 6 | 2 | 2 | 2 | 9-12 | 8 | |
| Rosenborg | 6 | 0 | 1 | 5 | 3-11 | 1 |
Groupe F
| Team | Pld. | W | D | L | Goals | Pts. | Qualf. |
| Arsenal | 6 | 3 | 2 | 1 | 14-7 | 11 | Play off |
| Eintracht Frankfurt | 6 | 3 | 0 | 3 | 8-10 | 9 | Play off |
| Standard Liege | 6 | 2 | 2 | 2 | 8-10 | 8 | |
| Guimaraes | 6 | 1 | 2 | 3 | 7-10 | 5 |
Groupe H
| Team | Pld. | W | D | L | Goals | Pts. | Qualf. |
| Espanyol | 6 | 3 | 2 | 1 | 12-4 | 11 | Play off |
| Ludogorets | 6 | 2 | 2 | 2 | 10-10 | 8 | Play off |
| Ferencvaros | 6 | 1 | 4 | 1 | 5-7 | 7 | |
| CSKA Moscow | 6 | 1 | 2 | 3 | 3-9 | 5 |
Groupe J
| Team | Pld. | W | D | L | Goals | Pts. | Qualf. |
| Başakşehir FK | 6 | 3 | 1 | 2 | 7-9 | 10 | Play off |
| AS Roma | 6 | 2 | 3 | 1 | 12-6 | 9 | Play off |
| B.Monchengladbach | 6 | 2 | 2 | 2 | 6-9 | 8 | |
| Wolfsberger AC | 6 | 1 | 2 | 3 | 7-8 | 5 |