| Aug 20, 2024 | Caetano | 0–1 | Costa | Round 9: Caetano, Cleusio - Costa, Bruno | Caro-Kann Defense | |
| Aug 18, 2024 | Costa | 0–1 | Julio | Round 8: Costa, Bruno - Julio, Rocha Miguel | Italian Game: Scotch Gambit, de Riviere Defense | |
| Aug 18, 2024 | Tchilulo | 0–1 | Costa | Round 7: Tchilulo, Celio - Costa, Bruno | English Opening: Anglo-Indian Defense, King's Indian Formation | |
| Aug 16, 2024 | Costa | 0–1 | Costa | Round 6: Costa, Bruno - Costa, Leopoldino | Italian Game: Deutz Gambit | |
| Aug 16, 2024 | Heidivander | 0–1 | Costa | Round 5: Heidivander, Junior - Costa, Bruno | Zukertort Opening: Nimzo-Larsen Variation | |
| Aug 15, 2024 | Costa | * | Bunga | Round 3: Costa, Bruno - Bunga, Avelino | Indian Defense: Spielmann-Indian | |
| Aug 15, 2024 | Henrique | ½–½ | Costa | Round 4: Henrique, Erikson - Costa, Bruno | London System | |
| Aug 14, 2024 | Costa | 1–0 | Junilson Anselno | Round 1: Costa, Bruno - Junilson Anselno | Italian Game: Deutz Gambit | |
| Aug 14, 2024 | Jose | ½–½ | Costa | Round 2: Jose, Ribeiro - Costa, Bruno | Indian Defense | |
| Aug 16, 2021 | Costa | 0–1 | Balaji | World Youth Cup 2021 O16-G12 - Open 16 | Italian Game: Two Knights Defense, Modern Bishop's Opening | |
| Aug 16, 2021 | Costa | 0–1 | Melian | World Youth Cup 2021 O16-G12 - Open 16 | Sicilian Defense: Kan Variation, Wing Attack | |
| Aug 16, 2021 | Costa | 1–0 | Lyon Martinez | World Youth Cup 2021 O16-G12 - Open 16 | French Defense: Exchange Variation | |
| Aug 16, 2021 | Costa | 0–1 | Blackford | World Youth Cup 2021 O16-G12 - Open 16 | Caro-Kann Defense: Panov Attack, Modern Defense, Mieses Line | |
| Aug 16, 2021 | Al Rashdi | 0–1 | Costa | World Youth Cup 2021 O16-G12 - Open 16 | Three Knights Opening | |
| Aug 16, 2021 | Phisitkul | 0–1 | Costa | World Youth Cup 2021 O16-G12 - Open 16 | Three Knights Opening | |
| Aug 16, 2021 | Cruz Mendez | 1–0 | Costa | World Youth Cup 2021 O16-G12 - Open 16 | Indian Defense: Normal Variation | |
| Aug 16, 2021 | Cani | 1–0 | Costa | World Youth Cup 2021 O16-G12 - Open 16 | Ruy Lopez: Morphy Defense, Classical Defense Deferred | |
| Aug 16, 2021 | Ragoobar | 1–0 | Costa | World Youth Cup 2021 O16-G12 - Open 16 | Ruy Lopez: Morphy Defense, Classical Defense Deferred | |
