| 1. Round | 22/08/1998 | FC Groningen | - | RBC Roosendaal | 6:0 | ||||
| 1. Round | 29/08/1998 | HFC Haarlem | - | FC Groningen | 2:3 | ||||
| 2. Round | 07/09/1998 | FC Groningen | - | BV Veendam | 2:0 | ||||
| 3. Round | 24/10/1998 | FC Groningen | - | Telstar | 0:2 | ||||
| 4. Round | 23/11/1998 | SBV Excelsior | - | FC Groningen | 0:2 | ||||
| 5. Round | 12/12/1998 | RBC Roosendaal | - | FC Groningen | 0:0 | ||||
| 5. Round | 19/12/1998 | FC Groningen | - | HFC Haarlem | 6:0 | ||||
| 9. Round | 18/04/1999 | BV Emmen | - | FC Groningen | 1:0 | ||||
| 10. Round | 08/05/1999 | FC Groningen | - | SBV Excelsior | 4:0 | ||||
| 10. Round | 15/05/1999 | Go Ahead Eagles | - | FC Groningen | 1:0 |
Netherlands