| Preliminary Round | 1st Qualifying Round | 2nd Qualifying Round | 3rd Qualifying Round | Playoff Round | Group Stage |
| 16th Finals | 8th Finals | Quarterfinals | Semifinals | Final |
Round:
Played
1st Round
09/20/2018 - Thursday
15:00
F91 Dudelange
0
x
1
Milan
15:00
Olympiacos
0
x
0
Betis
2nd Round
10/04/2018 - Thursday
12:55
Betis
3
x
0
F91 Dudelange
12:55
Milan
3
x
1
Olympiacos
3rd Round
10/25/2018 - Thursday
12:55
F91 Dudelange
0
x
2
Olympiacos
12:55
Milan
1
x
2
Betis
4th Round
11/08/2018 - Thursday
15:00
Betis
1
x
1
Milan
15:00
Olympiacos
5
x
1
F91 Dudelange
5th Round
11/29/2018 - Thursday
12:55
Betis
1
x
0
Olympiacos
12:55
Milan
5
x
2
F91 Dudelange
6th Round
12/13/2018 - Thursday
15:00
F91 Dudelange
0
x
0
Betis
15:00
Olympiacos
3
x
1
Milan