| 1. Ronde | 30.08.1998 | Real Zaragoza | - | Athletic Club | 2:0 | ||||
| 3. Ronde | 20.09.1998 | CF Extremadura | - | Athletic Club | 0:1 |  |
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| 4. Ronde | 26.09.1998 | Athletic Club | - | Real Madrid | 2:3 | ||||
| 5. Ronde | 04.10.1998 | Celta de Vigo | - | Athletic Club | 3:2 | ||||
| 7. Ronde | 25.10.1998 | UD Salamanca | - | Athletic Club | 2:1 | ||||
| 10. Ronde | 15.11.1998 | Athletic Club | - | Real Oviedo | 3:5 | |
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| 12. Ronde | 29.11.1998 | Athletic Club | - | RCD Mallorca | 1:0 | ||||
| 14. Ronde | 13.12.1998 | Athletic Club | - | Deportivo La Coruña | 2:1 | ||||
| 21. Ronde | 07.02.1999 | Racing Santander | - | Athletic Club | 2:0 |  |
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| 23. Ronde | 20.02.1999 | Real Madrid | - | Athletic Club | 0:1 | ||||
| 25. Ronde | 07.03.1999 | Valencia CF | - | Athletic Club | 4:1 | |
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| 29. Ronde | 11.04.1999 | Real Oviedo | - | Athletic Club | 0:0 | ||||
| 30. Ronde | 18.04.1999 | Athletic Club | - | CD Tenerife | 2:0 | ||||
| 31. Ronde | 25.04.1999 | RCD Mallorca | - | Athletic Club | 6:1 | ||||
| 32. Ronde | 02.05.1999 | Athletic Club | - | Atlético Madrid | 1:2 | |
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