1. Round | 07/08/1998 | Adanaspor | - | İstanbulspor AŞ | 0:1 | ||||
2. Round | 15/08/1998 | İstanbulspor AŞ | - | Samsunspor | 2:1 | ||||
4. Round | 29/08/1998 | İstanbulspor AŞ | - | Galatasaray | 1:4 | ||||
5. Round | 10/09/1998 | Trabzonspor | - | İstanbulspor AŞ | 0:0 | ||||
6. Round | 18/09/1998 | İstanbulspor AŞ | - | Sakaryaspor | 4:0 | ||||
7. Round | 25/09/1998 | Beşiktaş | - | İstanbulspor AŞ | 2:1 | ||||
8. Round | 16/10/1998 | İstanbulspor AŞ | - | MKE Ankaragücü | 1:4 | ||||
9. Round | 23/10/1998 | Antalyaspor | - | İstanbulspor AŞ | 2:3 |