| 25 oct 2025 | Harff, Marcel 2319 | Poltorak, Sebastian 2413 | 1-0 | A28 Apertura Inglesa: King's English Variation, Four Knights Variation, Quiet Line | European Chess Club Cup 2025 | Open Matches 1-16 | 63 | Ver |
| 24 oct 2025 | Kawulok, Marek 2219 | Harff, Marcel 2319 | 0-1 | C07 Defensa Francesa: Tarrasch Variation, Open System, Euwe-Keres Line | European Chess Club Cup 2025 | Open Matches 1-16 | 20 | Ver |
| 22 oct 2025 | Olcum, Ahmet 2221 | Harff, Marcel 2319 | 0-1 | A45 Defensa India: Accelerated London System | European Chess Club Cup 2025 | Open Matches 17+ | 64 | Ver |
| 21 oct 2025 | Harff, Marcel 2319 | Zanan, Evgeny 2504 | 0-1 | A28 Apertura Inglesa: King's English Variation, Four Knights Variation, Quiet Line | European Chess Club Cup 2025 | Open Matches 1-16 | 24 | Ver |