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| 1st(1st leg) | Botev Plovdiv | - | Slavia Sofia | 2:1 (2:1) | ||
| 2nd (2nd leg) | Slavia Sofia | - | Botev Plovdiv | 1:0 (0:0) | ||
| 1st(1st leg): 10/04/2018 17:00 | 2nd (2nd leg): 24/04/2018 16:30 | Winner: Slavia Sofia | ||||
| 1st(1st leg) | CSKA Sofia | - | Levski Sofia | 0:2 (0:1) | ||
| 2nd (2nd leg) | Levski Sofia | - | CSKA Sofia | 2:2 (1:0) | ||
| 1st(1st leg): 11/04/2018 16:00 | 2nd (2nd leg): 25/04/2018 16:30 | Winner: Levski Sofia | ||||
