| 15 jun 2026 | Bratovic, Blaz 2324 | Mestek, Igor 2065 | 1-0 | B01 Defensa Escandinava: Valencian Variation, Main Line | 38th International Chess Tournament Open Pula 2026 | 56 | Ver |
| 3 may 2026 | Belyaletdinov, Leonard 2215 | Mestek, Igor 2051 | 1-0 | B30 Defensa Siciliana: Nyezhmetdinov-Rossolimo Attack | LCF | 21 | Ver |
| 1 may 2026 | Breznik, Kristijan 2142 | Mestek, Igor 2051 | ½-½ | A11 Apertura Réti: Anglo-Slav Variation, Gurevich System | Ljubljana Chess Festival | 28 | Ver |
| 27 abr 2026 | Mestek, Igor 2051 | Reprintsev, Alexander 2283 | ½-½ | C45 Apertura Escocesa | LCF | 36 | Ver |
| 15 mar 2026 | Biti, Ozren 2267 | Mestek, Igor 2013 | ½-½ | B12 Defensa Caro-Kann: De Bruycker Defense | Bled Chess Festival 2026 | 67 | Ver |
| 14 mar 2026 | Mestek, Igor 2013 | Vujakovic, Branko 2219 | 1-0 | B07 Defensa Pirc | Bled Chess Festival 2026 | 13 | Ver |
| 10 mar 2026 | Zuzek, Bor 2057 | Mestek, Igor 2013 | 1-0 | B01 Defensa Escandinava: Valencian Variation, Main Line | Bled Chess Festival 2026 | 45 | Ver |
| 9 mar 2026 | Mestek, Igor 2013 | Furlan, Miha 2239 | ½-½ | C00 Defensa Francesa: Queen's Knight | Bled Chess Festival 2026 | 29 | Ver |
| 20 dic 2025 | Mestek, Igor 2054 | Zuzek, Bor 2011 | ½-½ | B23 Defensa Siciliana: Closed | Crikvenica open | 41 | Ver |
| 17 dic 2025 | Aljo, Johan 2031 | Mestek, Igor 2054 | ½-½ | D07 Gambito de Dama rehusado: Chigorin Defense, Exchange Variation | Crikvenica open | 40 | Ver |
| 16 dic 2025 | Mestek, Igor 2054 | Radenic, Filip 2261 | 0-1 | C00 Defensa Francesa: Schlechter Variation | Crikvenica open | 49 | Ver |
| 13 dic 2025 | Drasko, Milan 2311 | Mestek, Igor 2054 | 1-0 | A07 King's Indian Attack, with Bf5 | Crikvenica open | 26 | Ver |