| 31 ago 2026 | Mattenberger, Matthias 2369 | Haag, Gregor 2403 | ½-½ | D90 Defensa Grünfeld: Three Knights Variation | SUI-chT Luzern-Riehen | 44 | Ver |
| 31 ago 2026 | Haag, Gregor 2403 | Gemelli,Romain 2213 | 1-0 | D38 Gambito de Dama rehusado: Ragozin Defense, Alekhine Variation | SUI-chT Riehen-Echallens | 46 | Ver |
| 23 jun 2026 | Haag, Gregor 2410 | Colmenares, Aurelio 2312 | 1-0 | D24 Gambito de Dama aceptado | SUI-chT Riehen-Geneve | 41 | Ver |
| 23 jun 2026 | Haag, Gregor 2410 | Frey,Fabian 2249 | 0-1 | E71 Defensa India de Rey: Karpov System | SUI-chT Riehen-Wollishofen | 36 | Ver |
| 31 may 2026 | Kosteniuk, Alexandra 2491 | Haag, Gregor 2410 | 1-0 | B89 Defensa Siciliana: Sozin Attack, Main Line | Schweizer Mannschaftsmeisterschaft 2026, Nationalliga A | 36 | Ver |
| 21 abr 2026 | Ondozi, Murtez 2310 | Haag, Gregor 2406 | 0-1 | D94 Defensa Grünfeld: Three Knights Variation, Burille Variation | SMM NLA 2026 | 28 | Ver |
| 17 mar 2026 | Haag, Gregor 2410 | Zeller, Frank 2316 | 1-0 | E12 Defensa India de Dama: Petrosian Variation | SUI-chT Riehen-Bodan | 24 | Ver |
| 25 oct 2025 | Haag, Gregor 2403 | Klabis, Rokas 2391 | ½-½ | E11 Defensa Bogoindia: Vitolins Variation | European Chess Club Cup 2025 | Open Matches 1-16 | 35 | Ver |
| 24 oct 2025 | Levin, Guy 2466 | Haag, Gregor 2403 | 1-0 | D26 Gambito de Dama aceptado: Classical Defense, Steinitz Variation, Exchange Variation | European Chess Club Cup 2025 | Open Matches 1-16 | 41 | Ver |
| 23 oct 2025 | Ribstein, Orel 2138 | Haag, Gregor 2403 | 0-1 | A13 Apertura Inglesa: Agincourt Defense, Catalan Defense Accepted | European Chess Club Cup 2025 | Open Matches 1-16 | 47 | Ver |
| 22 oct 2025 | Haag, Gregor 2403 | Dragicevic, Drazen 2334 | 1-0 | D52 Gambito de Dama rehusado: Cambridge Springs Defense | European Chess Club Cup 2025 | Open Matches 1-16 | 41 | Ver |
| 21 oct 2025 | Haag, Gregor 2403 | Navara, David 2656 | ½-½ | E11 Defensa Bogoindia: Nimzowitsch Variation | European Chess Club Cup 2025 | Open Matches 1-16 | 40 | Ver |
| 20 oct 2025 | Haag, Gregor 2403 | Hove, Esben Kjems 2273 | 1-0 | D17 Defensa Eslava: Czech Variation, Carlsbad Variation | European Chess Club Cup 2025 | Open Matches 1-16 | 44 | Ver |
| 19 oct 2025 | Haag, Gregor 2403 | Lednicky, Martin 2109 | 1-0 | D15 Defensa Eslava: Chebanenko Variation | European Chess Club Cup 2025 | Open Matches 1-16 | 40 | Ver |
| 28 sep 2025 | Colmenares, Aurelio 2308 | Haag, Gregor 2405 | 1-0 | B50 Defensa Siciliana: Modern Variations | SMM Rd 8+9 | 47 | Ver |
| 27 sep 2025 | Fecker, Noah 2363 | Haag, Gregor 2405 | 0-1 | B52 Defensa Siciliana: Moscow Variation, Main Line | SMM Rd 8+9 | 61 | Ver |