| 13 ago 2026 | Grgantov, Marin 2257 | Bozinovic, Bogdan 2091 | ½-½ | B90 Defensa Siciliana: Najdorf Variation, English Attack | Split Chess Open 2026 | 34 | Ver |
| 12 ago 2026 | Mihalic, Goran 2080 | Grgantov, Marin 2257 | 0-1 | C78 Apertura Española (Ruy López): Morphy Defense, Arkhangelsk Variation | Split Chess Open 2026 | 68 | Ver |
| 9 ago 2026 | Zoldan, Matteo 2079 | Grgantov, Marin 2257 | 1-0 | B56 Defensa Siciliana: Classical Variation | Split Chess Open 2026 | 43 | Ver |
| 9 ago 2026 | Grgantov, Marin 2257 | Zagorac, Lara 2142 | ½-½ | C56 Apertura Italiana: Scotch Gambit, Janowski Defense | Split Chess Open 2026 | 38 | Ver |
| 8 ago 2026 | Plenkovic, Zdenko 2350 | Grgantov, Marin 2257 | 1-0 | A07 Ataque Indio de Rey: Yugoslav Variation | Split Chess Open 2026 | 76 | Ver |
| 5 ago 2026 | Grgantov, Marin 2257 | Franc, Borna 2245 | ½-½ | C01 Defensa Francesa: Exchange Variation | 35. Juniorsko Prvenstvo Hrvatske | 19 | Ver |
| 3 ago 2026 | Grgantov, Marin 2257 | Vidovic, Dominik 2073 | ½-½ | B90 Defensa Siciliana: Najdorf Variation, English Attack | 35. Juniorsko Prvenstvo Hrvatske | 33 | Ver |
| 2 ago 2026 | Grgantov, Marin 2257 | Babler, Jan 2074 | 0-1 | B90 Defensa Siciliana: Najdorf Variation, English Attack | 35. Juniorsko Prvenstvo Hrvatske | 49 | Ver |
| 2 ago 2026 | Konjevic, Nikola 2169 | Grgantov, Marin 2257 | ½-½ | B67 Defensa Siciliana: Richter-Rauzer Variation, Neo-Modern Variation | 35. Juniorsko Prvenstvo Hrvatske | 49 | Ver |
| 1 ago 2026 | Grgantov, Marin 2257 | Frouth, Vibor 2051 | 1-0 | B12 Defensa Caro-Kann: Advance Variation, Botvinnik-Carls Defense | 35. Juniorsko Prvenstvo Hrvatske | 54 | Ver |
| 26 jun 2026 | Tomas, Ante 2060 | Grgantov, Marin 2310 | ½-½ | A11 Apertura Réti: Anglo-Slav Variation, with g3 | 9th International Chess Tournament Solta Open 2026 - Blitz | 63 | Ver |
| 26 jun 2026 | Grgantov, Marin 2310 | Kucelj, Kevin 2104 | 1-0 | C03 Defensa Francesa: Tarrasch Variation | 9th International Chess Tournament Solta Open 2026 - Blitz | 23 | Ver |
| 26 jun 2026 | Biti, Ozren 2320 | Grgantov, Marin 2310 | ½-½ | B01 Defensa Escandinava | 9th International Chess Tournament Solta Open 2026 - Blitz | 52 | Ver |
| 26 jun 2026 | Grgantov, Marin 2310 | Basaric, Srdjan 2142 | 0-1 | C41 Defensa Philidor: Lion Variation | 9th International Chess Tournament Solta Open 2026 - Blitz | 42 | Ver |
| 26 jun 2026 | Veleski, Robert 2138 | Grgantov, Marin 2310 | 1-0 | A17 Apertura Inglesa: Anglo-Indian Defense, Hedgehog System | 9th International Chess Tournament Solta Open 2026 - Blitz | 52 | Ver |
| 26 jun 2026 | Grgantov, Marin 2310 | Enkhnar, Enkhbaatar 2246 | 0-1 | B23 Defensa Siciliana: Grand Prix Attack | 9th International Chess Tournament Solta Open 2026 - Blitz | 46 | Ver |
| 26 jun 2026 | Grgantov, Marin 2310 | Sibincic, Nikola 2094 | 1-0 | B23 Defensa Siciliana: Closed | 9th International Chess Tournament Solta Open 2026 - Blitz | 32 | Ver |
| 26 jun 2026 | Polok, Kacper 2162 | Grgantov, Marin 2310 | 0-1 | B01 Defensa Escandinava | 9th International Chess Tournament Solta Open 2026 - Blitz | 40 | Ver |
| 10 may 2026 | Pasztor, Balazs 2416 | Grgantov, Marin 2322 | 1-0 | C54 Apertura Italiana: Classical Variation, Giuoco Pianissimo | mitropa-men | 63 | Ver |
| 9 may 2026 | Grgantov, Marin 2322 | Borrmann, Laurenz 2402 | 0-1 | B23 Defensa Siciliana: Grand Prix Attack | mitropa-men | 34 | Ver |