StadiumEstadio Monumental
| Current capacity of the stadium |
| Standing | 54 000 |
| Seats | 34 000 |
| Tribune | 21 000 |
| Seats for sponsors | 1 000 |
| Fans attended |
| 21. 5. 2026 | FC Colo Colo-RKS Radomiak Radom 1910 | 24 033 |
| 14. 5. 2026 | FC Colo Colo-Gijón | 23 418 |
| 9. 5. 2026 | FC Colo Colo-Villena | 17 722 |
| 4. 5. 2026 | FC Colo Colo-CF Calella | 22 996 |
| 30. 4. 2026 | FC Colo Colo-Ubeda | 20 589 |
| 25. 4. 2026 | FC Colo Colo-Villarreal CF | 22 900 |
| 20. 4. 2026 | FC Colo Colo-Santander | 18 915 |
| 19. 4. 2026 | FC Colo Colo-Borac 1926 | 5 713 |
| 16. 4. 2026 | FC Colo Colo-La Coruna A | 20 925 |