| 1 ago 2026 | von Mettenheim, Johannes 2366 | Nemec, Jachym 2477 | 0-1 | A05 Ataque Indio de Rey: Spassky Variation | European Youth Team Chess Championship - Open18 | 49 | Ver |
| 6 abr 2026 | von Mettenheim, Johannes 2374 | Eull, Emil 2225 | 1-0 | D37 Gambito de Dama rehusado: Three Knights Variation | Grenke Chess Festival 2026 Open | 36 | Ver |
| 6 abr 2026 | Mohylnyi, Stepan 2243 | von Mettenheim, Johannes 2374 | ½-½ | C63 Apertura Española (Ruy López): Schliemann Defense, Tartakower Variation | Grenke Chess Festival 2026 Open | 24 | Ver |
| 4 abr 2026 | von Mettenheim, Johannes 2374 | Fanninger, Leon 2250 | 0-1 | A04 Apertura Zukertort: Kingside Fianchetto | Grenke Chess Festival 2026 Open | 35 | Ver |
| 4 ene 2026 | Nechitaylo, Nikita 2255 | von Mettenheim, Johannes 2375 | 0-1 | D36 Gambito de Dama rehusado: Exchange Variation, Reshevsky Variation | Runde 6: Nechitaylo, Nikita - von Mettenheim, Johannes | 36 | Ver |
| 4 ene 2026 | von Estorff, Jacob 2231 | von Mettenheim, Johannes 2375 | 0-1 | B70 Defensa Siciliana: Dragon Variation, Classical Variation | Runde 5: von Estorff, Jacob - von Mettenheim, Johannes | 47 | Ver |
| 3 ene 2026 | Tonndorf, Matthias 2163 | von Mettenheim, Johannes 2375 | 0-1 | E73 Defensa India de Rey: Semi-Averbakh System | Runde 3: Tonndorf, Matthias - von Mettenheim, Johannes | 42 | Ver |
| 2 ene 2026 | von Mettenheim, Johannes 2375 | Bundan, Edward 2103 | 1-0 | A05 Ataque Indio de Rey | Runde 2: von Mettenheim, Johannes - Bundan, Edward | 35 | Ver |
| 28 dic 2025 | von Mettenheim, Johannes 2375 | Hampel, Felix 2333 | ½-½ | E90 Defensa India de Rey: Larsen Variation | Runde 7: von Mettenheim, Johannes - Hampel, Felix | 17 | Ver |
| 28 dic 2025 | von Mettenheim, Johannes 2375 | Voege, Tobias 2307 | 0-1 | E17 Defensa India de Dama: Anti-Queen's Indian System | Runde 4: von Mettenheim, Johannes - Voege, Tobias | 30 | Ver |
| 28 dic 2025 | Reimer, Philip 2226 | von Mettenheim, Johannes 2375 | ½-½ | C60 Apertura Española (Ruy López): Cozio Defense | Runde 1: Reimer, Philip - von Mettenheim, Johannes | 25 | Ver |
| 6 oct 2025 | Soucek, Jan 2301 | von Mettenheim, Johannes 2404 | 1-0 | D35 Gambito de Dama rehusado: Exchange Variation, Positional Variation | FIDE World Youth Chess Championships 2025 | Open U18 | 43 | Ver |
| 5 oct 2025 | von Mettenheim, Johannes 2404 | Ughuzov, Ravan 2298 | ½-½ | A07 King's Indian Attack, with e6 | FIDE World Youth Chess Championships 2025 | Open U18 | 71 | Ver |