| Jun 26, 2026 | Torres Rebolledo | 1–0 | Costa | Round 11: Torres Rebolledo, Alvaro - Costa, Francisco Passos | Caro-Kann Defense: Advance Variation, Tal Variation | |
| Jun 25, 2026 | Costa | 1–0 | Tay | Round 10: Costa, Francisco Passos - Tay, Mason | Ruy Lopez: Morphy Defense, Modern Steinitz Defense | |
| Jun 24, 2026 | Warren | 0–1 | Costa | Round 9: Warren, Julian - Costa, Francisco Passos | Rapport-Jobava System | |
| Jun 23, 2026 | Costa | ½–½ | Vozhzhov | Round 8: Costa, Francisco Passos - Vozhzhov, Leonard | French Defense: Tarrasch Variation, Closed Variation | |
| Jun 22, 2026 | Belen | 1–0 | Costa | Round 7: Belen, James Matthew - Costa, Francisco Passos | Caro-Kann Defense: Classical Variation, Main Line | |
| Jun 20, 2026 | Costa | 0–1 | Ivarlac | Round 6: Costa, Francisco Passos - Ivarlac, Vladislav | Caro-Kann Defense | |
| Jun 19, 2026 | Ragavan | 1–0 | Costa | Round 5: Ragavan, Samarth Rajesh - Costa, Francisco Passos | King's Indian Defense: Fianchetto Variation, Yugoslav Variation, Exchange Line | |
| Jun 18, 2026 | Costa | ½–½ | Vyas | Round 4: Costa, Francisco Passos - Vyas, Miransh Purven | Caro-Kann Defense: Tartakower Variation | |
| Jun 17, 2026 | Xhelaj | 0–1 | Costa | Round 3: Xhelaj, Roel - Costa, Francisco Passos | Caro-Kann Defense: Exchange Variation | |
| Jun 16, 2026 | Costa | 1–0 | Mintz | Round 2: Costa, Francisco Passos - Mintz, Nathan | Sicilian Defense: Najdorf Variation | |
| Jun 15, 2026 | Ambartsumian | 1–0 | Costa | Round 1: Ambartsumian, Tyhran - Costa, Francisco Passos | King's Indian Defense: Normal Variation, Rare Defenses | |
| Jan 18, 2026 | Diamant | 1–0 | Costa | BCS Floripa - STD | Caro-Kann Defense: Apocalypse Attack | |
| Oct 16, 2024 | Da Silva | 0–1 | Costa | Manaus Chess Open 2024 | Catalan Opening: Open Defense, Classical Line | |
| Oct 15, 2024 | Costa | 1–0 | Benayon | Manaus Chess Open 2024 | Petrov's Defense: Stafford Gambit | |
| Oct 14, 2024 | Costa | 0–1 | Pessoa | Manaus Chess Open 2024 | Caro-Kann Defense: Karpov Variation, Tiviakov-Fischer Attack | |
| Oct 14, 2024 | Coelho | 0–1 | Costa | Manaus Chess Open 2024 | Caro-Kann Defense: Classical Variation | |
| Oct 13, 2024 | Cordero | 1–0 | Costa | Manaus Chess Open 2024 | Catalan Opening: Open Defense, Classical Line | |
| Oct 12, 2024 | Costa | 1–0 | Naief Moreira | Manaus Chess Open 2024 | Pirc Defense | |
| Oct 12, 2024 | Lucas Ferro Reis | 0–1 | Costa | Manaus Chess Open 2024 | Caro-Kann Defense: Accelerated Panov Attack, Modern Variation | |
| Oct 11, 2024 | Costa | 0–1 | Pinero Rodriguez | Manaus Chess Open 2024 | Sicilian Defense: Smith-Morra Gambit Declined, Push Variation | |
