| Vicencio, Lucas Fuentes Goncalves1652 | ½-½ | Da Costa, Ro1862 | Brazil Chess - Floripa | 2026 |
| Da Costa, Ro1862 | 0-1 | Amorim Filho, Robson Bezerra1683 | Brazil Chess - Floripa | 2026 |
| Shintate Junior, Paulo Sunao1642 | 0-1 | Da Costa, Ro1862 | Brazil Chess - Floripa | 2026 |
| Da Costa, Ro1862 | 0-1 | Penna, Flavio R Crautchychyn1679 | Brazil Chess - Floripa | 2026 |
| Do Carmo, Gabriel Carckeno2044 | 1-0 | Da Costa, Ro1862 | Brazil Chess - Floripa | 2026 |
| Da Costa, Ro1862 | 1-0 | Nunes, Lino Dias1588 | Brazil Chess - Floripa | 2026 |
| Azevedo Junior, Jose Ferreira2136 | 1-0 | Da Costa, Ro1862 | Brazil Chess - Floripa | 2026 |
| Da Costa, Ro1862 | 1-0 | De Almeida, Liz Neves | Brazil Chess - Floripa | 2026 |
| Da Costa, Ro1873 | 1-0 | Frassetto, Eduarda1544 | 11th Floripa Open 2025 | 2025 |
| Silva, Guilherme Henrique De Mora2071 | 1-0 | Da Costa, Ro1873 | 11th Floripa Open 2025 | 2025 |
| Da Costa, Ro1873 | 1-0 | Ribeiro, Erica De Jesus1657 | 11th Floripa Open 2025 | 2025 |
| Fossatti, Igor Anton1635 | ½-½ | Da Costa, Ro1873 | 11th Floripa Open 2025 | 2025 |
| Da Costa, Ro1873 | 0-1 | Kropff, R2121 | 11th Floripa Open 2025 | 2025 |
| Almeida Junior, Alvaro Alves de2138 | 1-0 | Da Costa, Ro1873 | 11th Floripa Open 2025 | 2025 |
| Da Costa, Ro1873 | 1-0 | Kruk, Nicolas Tonial | 11th Floripa Open 2025 | 2025 |