 |
 |
|
|
| 1st(1st leg) | CF Fuenlabrada | - | Villarreal CF B | 0:0 (0:0) | ||
| 2nd (2nd leg) | Villarreal CF B | - | CF Fuenlabrada | 2:0 (1:0) | ||
| 1st(1st leg): 02/06/2018 17:00 | 2nd (2nd leg): 10/06/2018 11:00 | Winner: Villarreal CF B | ||||
| 1st(1st leg) | RC Celta B | - | FC Cartagena | 0:0 (0:0) | ||
| 2nd (2nd leg) | FC Cartagena | - | RC Celta B | 1:0 (1:0) | ||
| 1st(1st leg): 03/06/2018 11:00 | 2nd (2nd leg): 10/06/2018 17:30 | Winner: FC Cartagena | ||||
| 1st(1st leg) | Extremadura UD | - | CD Mirandés | 0:1 (0:0) | ||
| 2nd (2nd leg) | CD Mirandés | - | Extremadura UD | 0:2 (0:1) | ||
| 1st(1st leg): 03/06/2018 16:00 | 2nd (2nd leg): 09/06/2018 15:00 | Winner: Extremadura UD | ||||
| 1st(1st leg) | Elche CF | - | Sporting Gijón B | 2:1 (0:1) | ||
| 2nd (2nd leg) | Sporting Gijón B | - | Elche CF | 1:2 (0:0) | ||
| 1st(1st leg): 03/06/2018 18:00 | 2nd (2nd leg): 10/06/2018 15:00 | Winner: Elche CF | ||||
