| 19 nov 2025 | Mateu Guiu, Esteve 2140 | Mertens, Marc 2101 | ½-½ | A15 Apertura Inglesa: Anglo-Indian Defense, King's Indian Formation | 9th ESNA Chess Championship 2025 | 28 | Ver |
| 17 nov 2025 | Zerafa, Patrick 2009 | Mertens, Marc 2101 | 0-1 | A13 Apertura Inglesa: Agincourt Defense | 9th ESNA Chess Championship 2025 | 47 | Ver |
| 30 oct 2025 | Wallner, Joachim 2242 | Mertens, Marc 2111 | 1-0 | A01 Ataque Nimzo-Larsen: Indian Variation | FIDE World Senior Championship 2025 | Open 50+ | 27 | Ver |
| 29 oct 2025 | Mertens, Marc 2111 | Kantorik, Marian 2211 | ½-½ | C70 Apertura Española (Ruy López): Morphy Defense, Norwegian Variation | FIDE World Senior Championship 2025 | Open 50+ | 32 | Ver |
| 28 oct 2025 | Tikzhanov, Yerlan 2280 | Mertens, Marc 2111 | 1-0 | B22 Defensa Siciliana: Alapin Variation | FIDE World Senior Championship 2025 | Open 50+ | 22 | Ver |
| 26 oct 2025 | Mertens, Marc 2111 | Khatanbaatar, Bazar 2311 | 1-0 | B90 Defensa Siciliana: Najdorf Variation, Adams Attack | FIDE World Senior Championship 2025 | Open 50+ | 53 | Ver |
| 24 oct 2025 | Mertens, Marc 2111 | Van Ketel, Raoul 2191 | 0-1 | C07 Defensa Francesa: Tarrasch Variation, Open System, Euwe-Keres Line | FIDE World Senior Championship 2025 | Open 50+ | 47 | Ver |
| 22 oct 2025 | Mertens, Marc 2111 | Raetsky, Alexander 2297 | 0-1 | C70 Apertura Española (Ruy López): Morphy Defense, Schliemann Defense Deferred | FIDE World Senior Championship 2025 | Open 50+ | 16 | Ver |