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| 1st(1st leg) | Qarabağ FK | - | FC København | 1:0 (1:0) | ||
| 2nd (2nd leg) | FC København | - | Qarabağ FK | 2:1 (1:0) | ||
| 1st(1st leg): 15/08/2017 17:00 | 2nd (2nd leg): 23/08/2017 19:45 | Winner: Qarabağ FK | ||||
| 1st(1st leg) | APOEL Nikosia | - | Slavia Praha | 2:0 (2:0) | ||
| 2nd (2nd leg) | Slavia Praha | - | APOEL Nikosia | 0:0 (0:0) | ||
| 1st(1st leg): 15/08/2017 19:45 | 2nd (2nd leg): 23/08/2017 19:45 | Winner: APOEL Nikosia | ||||
| 1st(1st leg) | BSC Young Boys | - | CSKA Moskva | 0:1 (0:0) | ||
| 2nd (2nd leg) | CSKA Moskva | - | BSC Young Boys | 2:0 (1:0) | ||
| 1st(1st leg): 15/08/2017 19:45 | 2nd (2nd leg): 23/08/2017 19:45 | Winner: CSKA Moskva | ||||
| 1st(1st leg) | 1899 Hoffenheim | - | Liverpool FC | 1:2 (0:1) | ||
| 2nd (2nd leg) | Liverpool FC | - | 1899 Hoffenheim | 4:2 (3:1) | ||
| 1st(1st leg): 15/08/2017 19:45 | 2nd (2nd leg): 23/08/2017 19:45 | Winner: Liverpool FC | ||||
| 1st(1st leg) | Sporting CP | - | FCSB | 0:0 (0:0) | ||
| 2nd (2nd leg) | FCSB | - | Sporting CP | 1:5 (1:1) | ||
| 1st(1st leg): 15/08/2017 19:45 | 2nd (2nd leg): 23/08/2017 19:45 | Winner: Sporting CP | ||||
| 1st(1st leg) | Olympiakos Piraeus | - | HNK Rijeka | 2:1 (0:1) | ||
| 2nd (2nd leg) | HNK Rijeka | - | Olympiakos Piraeus | 0:1 (0:1) | ||
| 1st(1st leg): 16/08/2017 19:45 | 2nd (2nd leg): 22/08/2017 19:45 | Winner: Olympiakos Piraeus | ||||
| 1st(1st leg) | Celtic FC | - | FK Astana | 5:0 (2:0) | ||
| 2nd (2nd leg) | FK Astana | - | Celtic FC | 4:3 (1:1) | ||
| 1st(1st leg): 16/08/2017 19:45 | 2nd (2nd leg): 22/08/2017 16:30 | Winner: Celtic FC | ||||
| 1st(1st leg) | Hapoel Be'er Sheva | - | NK Maribor | 2:1 (2:1) | ||
| 2nd (2nd leg) | NK Maribor | - | Hapoel Be'er Sheva | 1:0 (1:0) | ||
| 1st(1st leg): 16/08/2017 19:45 | 2nd (2nd leg): 22/08/2017 19:45 | Winner: NK Maribor | ||||
| 1st(1st leg) | İstanbul Başakşehir | - | Sevilla FC | 1:2 (0:1) | ||
| 2nd (2nd leg) | Sevilla FC | - | İstanbul Başakşehir | 2:2 (0:1) | ||
| 1st(1st leg): 16/08/2017 19:45 | 2nd (2nd leg): 22/08/2017 19:45 | Winner: Sevilla FC | ||||
| 1st(1st leg) | SSC Napoli | - | OGC Nice | 2:0 (1:0) | ||
| 2nd (2nd leg) | OGC Nice | - | SSC Napoli | 0:2 (0:0) | ||
| 1st(1st leg): 16/08/2017 19:45 | 2nd (2nd leg): 22/08/2017 19:45 | Winner: SSC Napoli | ||||
