| Coetsee, Dewald1965 | 0-1 | Menahem, Adi2316 | World Youth Open U18 2026 | 2026 |
| Coetsee, Dewald1965 | 1-0 | Testelecs, Ilja Kuprijans1867 | World Youth Open U18 2026 | 2026 |
| Angulo Perez, Sebastian2182 | 1-0 | Coetsee, Dewald1965 | World Youth Open U18 2026 | 2026 |
| Mukhamed, Nazir2136 | 1-0 | Coetsee, Dewald1965 | World Youth Open U18 2026 | 2026 |
| Coetsee, Dewald1965 | ½-½ | Valpas, Jami2111 | World Youth Open U18 2026 | 2026 |
| Leal Mendez, Jose Raul1453 | 0-1 | Coetsee, Dewald1965 | World Youth Open U18 2026 | 2026 |
| Coetsee, Dewald1965 | 0-1 | Abdin, Mahmoud2209 | World Youth Open U18 2026 | 2026 |
| Tsai, Chia-Chen1718 | 0-1 | Coetsee, Dewald1965 | World Youth Open U18 2026 | 2026 |
| Coetsee, Dewald1965 | 0-1 | Papaioannou, Dimitrios2348 | World Youth Open U18 2026 | 2026 |
| Kot, Emanuel2313 | 1-0 | Coetsee, Dewald1965 | World Youth Open U18 2026 | 2026 |
| Coetsee, Dewald1399 | 1-0 | Pusara, Mihailo1938 | World Youth U16 Olympiad | 2023 |
| Hernandez Mendez, Iker1848 | 1-0 | Coetsee, Dewald1399 | World Youth U16 Olympiad | 2023 |
| Coetsee, Dewald1399 | 0-1 | Ramaj, Ergit1934 | World Youth U16 Olympiad | 2023 |
| Coetsee, Dewald1218 | ½-½ | Baloyi, Xikombi1890 | South African Open 2022 | 2022 |
| Mumba Elijah1859 | 1-0 | Coetsee, Dewald1218 | South African Open 2022 | 2022 |