| 1. Jornada | 18.07.1998 | FC St. Gallen | - | BSC Young Boys | 3:1 | ||||
| 2. Jornada | 21.07.1998 | FC Lugano | - | FC St. Gallen | 2:2 | ||||
| 3. Jornada | 25.07.1998 | FC St. Gallen | - | FC Sion | 2:0 | ||||
| 4. Jornada | 31.07.1998 | FC Aarau | - | FC St. Gallen | 2:6 |  |
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| 5. Jornada | 07.08.1998 | FC St. Gallen | - | FC Zürich | 0:0 | ||||
| 6. Jornada | 15.08.1998 | Servette FC | - | FC St. Gallen | 1:0 | ||||
| 7. Jornada | 23.08.1998 | FC St. Gallen | - | Basilea | 0:1 | ||||
| 8. Jornada | 28.08.1998 | Neuchâtel Xamax FC | - | FC St. Gallen | 2:0 | ||||
| 9. Jornada | 06.09.1998 | FC St. Gallen | - | FC Luzern | 2:1 | ||||
| 10. Jornada | 11.09.1998 | FC St. Gallen | - | Grasshopper Club Zürich | 3:1 | ||||
| 11. Jornada | 20.09.1998 | Lausanne Sports | - | FC St. Gallen | 1:0 | ||||
| 13. Jornada | 03.10.1998 | FC St. Gallen | - | FC Lugano | 4:4 |  |
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| 14. Jornada | 18.10.1998 | FC Sion | - | FC St. Gallen | 2:1 | ||||
| 15. Jornada | 25.10.1998 | FC St. Gallen | - | FC Aarau | 4:3 | ||||
| 16. Jornada | 30.10.1998 | FC Zürich | - | FC St. Gallen | 3:1 | |
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| 17. Jornada | 08.11.1998 | FC St. Gallen | - | Servette FC | 0:0 | ||||
| 18. Jornada | 15.11.1998 | Basilea | - | FC St. Gallen | 1:0 | ||||
| 22. Jornada | 13.12.1998 | FC St. Gallen | - | Lausanne Sports | 0:1 |
Bulgaria