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| 19.09.2017 | 20:00 | Sporting Gijón | - | CD Numancia | 1:3 (1:1, 1:1, 1:1) d.p. | |
| 20.09.2017 | 20:00 | SD Formentera | - | UD Logroñés | 4:3 (0:0, 2:2) n.v. | |
| 20:00 | Córdoba CF | - | CD Tenerife | 1:4 (1:2) | ||
| 20:15 | Gimnástica Segoviana | - | SD Ponferradina | 0:1 (0:0) | ||
| 20:30 | CD Calahorra | - | CF Fuenlabrada | 1:3 (0:3) | ||
| 20:45 | CF Talavera | - | FC Cartagena | 0:1 (0:0, 0:0) n.v. | ||
| 21:00 | Hércules CF | - | Elche CF | 0:1 (0:0) | ||
| 21:00 | Cádiz CF | - | CA Osasuna | 1:0 (1:0) | ||
| 21:30 | Real Murcia | - | UE Olot | 3:1 (1:1) | ||
| 21.09.2017 | 20:00 | Cultural Leonesa | - | Real Valladolid | 0:4 (0:1) | |
| 21:00 | Real Zaragoza | - | CD Lugo | 1:0 (1:0) |
