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| H (Match allé) | Lokomotiv Plovdiv | - | Slavia Sofia | 3:1 (1:1) | ||
| R (match retour) | Slavia Sofia | - | Lokomotiv Plovdiv | 0:3 (0:1) | ||
| H (Match allé): 04.05.2018 16:30 | R (match retour): 13.05.2018 18:00 | vainqueur: Lokomotiv Plovdiv | ||||
| H (Match allé) | Cherno More Varna | - | Septemvri Sofia | 2:1 (1:0) | ||
| R (match retour) | Septemvri Sofia | - | Cherno More Varna | 1:2 (0:2) | ||
| H (Match allé): 05.05.2018 16:00 | R (match retour): 11.05.2018 16:30 | vainqueur: Cherno More Varna | ||||
