| Preliminary Round | 1st Qualifying Round | 2nd Qualifying Round | 3rd Qualifying Round | Playoff Round | Group Stage |
| 16th Finals | 8th Finals | Quarterfinals | Semifinals | Final |
Rodada:
Jogados
1ª Rodada
20/09/2018 - Quinta
12:00
F91 Dudelange
0
x
1
Milan
12:00
Olympiacos
0
x
0
Betis
2ª Rodada
04/10/2018 - Quinta
09:55
Betis
3
x
0
F91 Dudelange
09:55
Milan
3
x
1
Olympiacos
3ª Rodada
25/10/2018 - Quinta
09:55
F91 Dudelange
0
x
2
Olympiacos
09:55
Milan
1
x
2
Betis
4ª Rodada
08/11/2018 - Quinta
12:00
Betis
1
x
1
Milan
12:00
Olympiacos
5
x
1
F91 Dudelange
5ª Rodada
29/11/2018 - Quinta
09:55
Betis
1
x
0
Olympiacos
09:55
Milan
5
x
2
F91 Dudelange
6ª Rodada
13/12/2018 - Quinta
12:00
F91 Dudelange
0
x
0
Betis
12:00
Olympiacos
3
x
1
Milan