CALENDARIO LIGA 99-00
| JORNADA | FECHA | PARTIDO | RESULTADO |
1a |
22-08-99 |
Athletic Club - Real Betis | 1-0 |
2a |
29-08-99 | Valladolid - Athletic Club | 0-1 |
| 3a | 12-09-99 | Athletic Club - Real Madrid | 2-2 |
| 4a | 19-09-99 | Numancia - Athletic Club | 1-1 |
| 5a | 26-09-99 | Mallorca - Athletic Club | 2-1 |
| 6a | 03-10-99 | Athletic Club - Deportivo | 2-3 |
| 7a | 13-10-99 | Málaga - Athletic Club | 3-4 |
| 8a | 17-10-99 | Athletic Club - Valencia | 1-0 |
| 9a | 24-10-99 | Barça - Athletic Club | 4-0 |
| 10a | 31-10-99 | Athletic Club - Real Oviedo | 1-1 |
| 11a | 07-11-99 | Sevilla - Athletic Club | 0-0 |
| 12a | 21-11-99 | Athletic Club - Atl. de Madrid | 4-2 |
| 13a | 28-11-99 | Rayo Vallecano - Athletic Club | 1-2 |
| 14a | 05-12-99 | Athletic Club - Real Sociedad | 1-1 |
| 15a | 12-12-99 | Celta - Athletic Club | 1-1 |
| 16a | 19-12-99 | Athletic Club - Real Zaragoza | 2-2 |
| 17a | 22-12-99 | Racing - Athletic Club | 2-2 |
| 18a | 05-01-00 | Athletic Club - Espanyol | 2-1 |
| 19a | 09-01-00 | Alavés - Athletic Club | 2-1 |
| 20a | 16-01-00 | Betis - Athletic Club | 1-2 |
| 21a | 23-01-00 | Athletic Club - Valladolid | 1-0 |
| 22a | 30-01-00 | Real Madrid - Athletic Club | |
| 23a | 06-02-00 | Athletic Club - Numancia | |
| 24a | 13-02-99 | Athletic Club - Mallorca | |
| 25a | 20-02-99 | Deportivo - Athletic Club | |
| 26a | 27-02-99 | Athletic Club - Málaga | |
| 27a | 05-03-00 | Valencia - Athletic Club | |
| 28a | 12-03-00 | Athletic Club - F.C. Barcelona | |
| 29a | 19-03-00 | Real Oviedo - Athletic Club | |
| 30a | 26-03-00 | Athletic Club - Sevilla | |
| 31a | 02-04-00 | Atletico de Madrid - Athletic Club | |
| 31a | 09-04-00 | Athletic Club - Rayo Vallecano | |
| 32a | 16-04-00 | Real Sociedad - Athletic Club | |
| 33a | 23-04-00 | Athletic Club - Celta | |
| 34a | 30-04-00 | Real Zaragoza - Athletic Club | |
| 35a | 07-05-00 | Athletic Club - Racing | |
| 36a | 14-05-00 | Espanyol - Athletic Club | |
| 37a | 21-05-00 | Athletic Club - Alaves |
