| Nov 16, 2025 | Jacobs | ½–½ | Sagastegui | Round 9: Jacobs, Annelaine - Sagastegui, Thamara | Ruy Lopez: Cozio Defense | |
| Nov 15, 2025 | Sagastegui | ½–½ | Cabral | Round 8: Sagastegui, Thamara - Cabral, Sylvi | Four Knights Game: Scotch Variation Accepted | |
| Nov 14, 2025 | Aponte | 0–1 | Sagastegui | Round 6: Aponte, Samantha - Sagastegui, Thamara | Pseudo Queen's Indian Defense | |
| Nov 9, 2025 | Sagastegui | 1–0 | Manchani | Round 5: Sagastegui, Thamara - Manchani, Aaradhya | Four Knights Game: Scotch Variation | |
| Nov 9, 2025 | Lockhart | ½–½ | Sagastegui | Round 4: Lockhart, Brooke - Sagastegui, Thamara | Italian Game: Hungarian Defense | |
| Nov 8, 2025 | Sagastegui | 1–0 | Rafini | Round 3: Sagastegui, Thamara - Rafini, Sophie-Belle | Three Knights Opening | |
| Nov 8, 2025 | Karamchandani | 0–1 | Sagastegui | Round 2: Karamchandani, Khyati - Sagastegui, Thamara | Italian Game: Hungarian Defense | |
| Nov 7, 2025 | Sagastegui | 1–0 | Lumenier | Round 1: Sagastegui, Thamara - Lumenier, Kayleigh E.M. | Three Knights Opening | |
| Nov 7, 2025 | Sagastegui | 1–0 | Motwani | Round 7: Sagastegui, Thamara - Motwani, Grayce | Three Knights Opening: Schlechter Variation | |
| Sep 22, 2024 | Wilson | ½–½ | Sagastegui | 45th FIDE Women's Chess Olympiad | Queen's Indian Accelerated | |
| Sep 21, 2024 | Sagastegui | 0–1 | Miladi | 45th FIDE Women's Chess Olympiad | Sicilian Defense: Alapin Variation, Smith-Morra Declined | |
| Sep 20, 2024 | Sagastegui | 0–1 | Rouda Essa | 45th FIDE Women's Chess Olympiad | Sicilian Defense: Alapin Variation, Barmen Defense | |
| Sep 16, 2024 | Sagastegui | ½–½ | Ravelomanana | 45th FIDE Women's Chess Olympiad | Scotch Game: Malaniuk Variation | |
| Aug 29, 2021 | Sagastegui | 0–1 | Roepke | Online_Olympiad_Div3_PoolD | Petrov's Defense: Classical Attack, Chigorin Variation | |
| Aug 29, 2021 | La Fleur | ½–½ | Sagastegui | Online_Olympiad_Div3_PoolD | Italian Game: Classical Variation, Giuoco Pianissimo | |
| Aug 28, 2021 | Sagastegui | 0–1 | LakshiDutt | Online_Olympiad_Div3_PoolD | Scotch Game: Classical Variation | |
| Aug 28, 2021 | Beltran Salvador | 1–0 | Sagastegui | Online_Olympiad_Div3_PoolD | Queen's Indian Accelerated | |
| Aug 28, 2021 | Antoniou | 0–1 | Sagastegui | Online_Olympiad_Div3_PoolD | Italian Game: Giuoco Piano | |
| Aug 27, 2021 | Sagastegui | 0–1 | Kaslan | Online_Olympiad_Div3_PoolD | Sicilian Defense: Najdorf Variation, Lipnitsky Attack | |
| Aug 22, 2021 | Sagastegui | 1–0 | Njock | Online_Olympiad_Div4_PoolD | Sicilian Defense: Alapin Variation | |
| Aug 22, 2021 | Safietou | 0–1 | Sagastegui | Online_Olympiad_Div4_PoolD | Italian Game: Classical Variation, Greco Gambit, Traditional Line | |
| Aug 21, 2021 | Sagastegui | ½–½ | Gomes | Online_Olympiad_Div4_PoolD | Scotch Game | |
| Aug 21, 2021 | Kaslan | 1–0 | Sagastegui | Online_Olympiad_Div4_PoolD | Scotch Game: Mieses Variation | |
