| 22 ago 2026 | Lomsadze, Irakly 2059 | Hertneck, Gerald 2415 | 1-0 | A62 Defensa Benoni: Fianchetto Variation | Oberbank Challenger Open 2026 | 45 | Ver |
| 21 ago 2026 | Hertneck, Gerald 2415 | Badelka, Olga 2416 | 0-1 | D02 Apertura de Peón de Dama: Symmetrical Variation | Oberbank Challenger Open 2026 | 44 | Ver |
| 20 ago 2026 | Schernthaner, David 2380 | Hertneck, Gerald 2415 | ½-½ | C41 Defensa Philidor: Lion Variation | Oberbank Challenger Open 2026 | 55 | Ver |
| 18 ago 2026 | Koelber, Daniel 2255 | Hertneck, Gerald 2415 | 0-1 | B12 Defensa Caro-Kann: Advance Variation, Short Variation | Oberbank Challenger Open 2026 | 34 | Ver |
| 17 ago 2026 | Hertneck, Gerald 2415 | Zaiarski, Stepan 2143 | 1-0 | E82 Defensa India de Rey: Sämisch Variation, Double Fianchetto | Oberbank Challenger Open 2026 | 47 | Ver |
| 16 ago 2026 | Archan, Elikya 2082 | Hertneck, Gerald 2415 | 0-1 | A42 Defensa Moderna: Averbakh Variation, Pseudo-Sämisch | Oberbank Challenger Open 2026 | 23 | Ver |
| 15 ago 2026 | Hertneck, Gerald 2415 | Stadler, Peter 2000 | 1-0 | B06 Defensa Moderna | Oberbank Challenger Open 2026 | 37 | Ver |
| 12 ago 2026 | Hertneck, Gerald 2415 | Koellner, Ruben Gideon 2531 | 0-1 | C41 Defensa Philidor: Lion Variation | Oberbank Challenger Open 2026 | 75 | Ver |
| 24 jul 2026 | Hertneck, Gerald 2428 | Nemitz, Alfred 2343 | 0-1 | A45 Ataque Trompowsky | German Chess Championship 2026 | Candidates Men | 47 | Ver |
| 23 jul 2026 | Hinrichs, Paul 2307 | Hertneck, Gerald 2428 | ½-½ | D11 Defensa Eslava: Modern Line | German Chess Championship 2026 | Candidates Men | 52 | Ver |
| 22 jul 2026 | Hertneck, Gerald 2428 | Moeller, Maurin 2301 | 1-0 | A04 Apertura Zukertort: Sicilian Invitation | German Chess Championship 2026 | Candidates Men | 49 | Ver |
| 22 jul 2026 | Pfrommer, Christoph 2275 | Hertneck, Gerald 2428 | 0-1 | D15 Defensa Eslava: Chebanenko Variation | German Chess Championship 2026 | Candidates Men | 18 | Ver |
| 21 jul 2026 | Hertneck, Gerald 2428 | Steger, Lukas Daniel 2196 | ½-½ | E81 Defensa India de Rey: Sämisch Variation, Sämisch Gambit Accepted | German Chess Championship 2026 | Candidates Men | 53 | Ver |
| 20 jul 2026 | Neuhoff, Laertes 2306 | Hertneck, Gerald 2428 | 1-0 | B19 Defensa Caro-Kann: Classical Variation | German Chess Championship 2026 | Candidates Men | 37 | Ver |
| 20 jul 2026 | Hertneck, Gerald 2428 | Stricker, Florian 2231 | 1-0 | D30 Gambito de Dama rehusado | German Chess Championship 2026 | Candidates Men | 25 | Ver |
| 19 jul 2026 | Benjamin Wagner 2285 | Hertneck, Gerald 2428 | 1-0 | C15 Defensa Francesa: Winawer Variation, Delayed Exchange Variation | German Chess Championship 2026 | Candidates Men | 33 | Ver |
| 26 abr 2026 | Levin, Felix 2414 | Hertneck, Gerald 2433 | ½-½ | A06 Apertura Zukertort | German Bundesliga 2025/26 | 23 | Ver |
| 22 mar 2026 | Hertneck, Gerald 2432 | Wong, Gengchun 2229 | ½-½ | D17 Defensa Eslava: Czech Variation, Krause Attack | Schachbundesliga 2025/2026 | 41 | Ver |
| 1 mar 2026 | Hertneck, Gerald 2432 | Winterberg, Lukas 2421 | 1-0 | D20 Gambito de Dama aceptado: Central Variation, Greco Variation | SBL München | 57 | Ver |
| 8 feb 2026 | Hertneck, Gerald 2432 | Sawatzki, Frank 2336 | 1-0 | D15 Defensa Eslava: Geller Gambit | 1. BL Pauli | 45 | Ver |