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Group 1
Group 2
Group 3
Group 4
Group 5
Ranking of second-placed teams
Promotion ~ Challenge Cup (Play Offs: )
Quarter-finals
Semi-finals
Final
2017/18 Main
Group 1
| Pl | W | D | L | Pts | |||
| 1 | Newcastle Falcons | 6 | 6 | 0 | 0 | 229:122 | 28 |
| 2 | Dragons | 6 | 3 | 0 | 3 | 156:133 | 16 |
| 3 | Bordeaux Begles | 6 | 3 | 0 | 3 | 190:178 | 16 |
| 4 | Enisey | 6 | 0 | 0 | 6 | 91:233 | 1 |
Group 2
| Pl | W | D | L | Pts | |||
| 1 | Cardiff Rugby | 6 | 5 | 0 | 1 | 99:95 | 21 |
| 2 | Stade Toulousain | 6 | 2 | 1 | 3 | 117:120 | 14 |
| 3 | Sale Sharks | 6 | 2 | 1 | 3 | 110:102 | 12 |
| 4 | Lyon | 6 | 2 | 0 | 4 | 121:130 | 11 |
Group 3
| Pl | W | D | L | Pts | |||
| 1 | Section Paloise | 6 | 6 | 0 | 0 | 207:125 | 29 |
| 2 | Gloucester | 6 | 4 | 0 | 2 | 253:139 | 21 |
| 3 | Zebre | 6 | 1 | 0 | 5 | 133:257 | 8 |
| 4 | Agen | 6 | 1 | 0 | 5 | 148:220 | 6 |
Group 4
| Pl | W | D | L | Pts | |||
| 1 | Edinburgh | 6 | 5 | 0 | 1 | 282:98 | 25 |
| 2 | Stade Francais Paris | 6 | 3 | 0 | 3 | 151:166 | 17 |
| 3 | London Irish | 6 | 3 | 0 | 3 | 169:154 | 16 |
| 4 | Krasny Yar Krasnoyarsk | 6 | 1 | 0 | 5 | 106:290 | 6 |
Group 5
| Pl | W | D | L | Pts | |||
| 1 | Connacht | 6 | 5 | 1 | 0 | 225:102 | 26 |
| 2 | CA Brive | 6 | 3 | 0 | 3 | 161:162 | 17 |
| 3 | Worcester Warriors | 6 | 2 | 1 | 3 | 124:133 | 15 |
| 4 | US Oyonnax | 6 | 1 | 0 | 5 | 102:215 | 4 |
Ranking of second-placed teams
| Pl | W | D | L | Pts | |||
| 1 | Gloucester | 6 | 4 | 0 | 2 | 253:139 | 21 |
| 2 | CA Brive | 6 | 3 | 0 | 3 | 161:162 | 17 |
| 3 | Stade Francais Paris | 6 | 3 | 0 | 3 | 151:166 | 17 |
| 4 | Dragons | 6 | 3 | 0 | 3 | 156:133 | 16 |
| 5 | Stade Toulousain | 6 | 2 | 1 | 3 | 117:120 | 14 |
Promotion ~ Challenge Cup (Play Offs: )
2017/18 Play Offs
Quarter-finals
| 1 | Edinburgh | Cardiff Rugby | 6 : 20 |
| 2 | Section Paloise | Stade Francais Paris | 35 : 32 |
| 3 | Connacht | Gloucester | 28 : 33 |
| 4 | Newcastle Falcons | CA Brive | 25 : 10 |
Semi-finals
| 1 | Cardiff Rugby | Section Paloise | 16 : 10 |
| 2 | Gloucester | Newcastle Falcons | 33 : 12 |
Final
| 1 | Cardiff Rugby | Gloucester | 31 : 30 |
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