| 15 ago 2026 | Kozlovic, Jernej 2328 | Belyaletdinov, Leonard 2264 | ½-½ | B10 Defensa Caro-Kann: Endgame Offer | European Junior Chess Championship 2026 | Open | 69 | Ver |
| 14 ago 2026 | Vassis, Anastasios 2156 | Kozlovic, Jernej 2328 | 0-1 | A05 Ataque Indio de Rey | European Junior Chess Championship 2026 | Open | 54 | Ver |
| 13 ago 2026 | Kozlovic, Jernej 2328 | Collin, Moritz Valentin 2341 | 0-1 | B13 Defensa Caro-Kann: Panov Attack, Modern Defense | European Junior Chess Championship 2026 | Open | 52 | Ver |
| 12 ago 2026 | Davidek, Zdenek 2196 | Kozlovic, Jernej 2328 | 0-1 | E49 Defensa Nimzoindia: Normal Variation, Botvinnik System | European Junior Chess Championship 2026 | Open | 59 | Ver |
| 10 ago 2026 | Kozlovic, Jernej 2328 | Kovalskyi, Roman 2197 | ½-½ | C42 Defensa Petrov: Paulsen Attack | European Junior Chess Championship 2026 | Open | 48 | Ver |
| 9 ago 2026 | Gusev, Mikhail 2212 | Kozlovic, Jernej 2328 | ½-½ | A46 Defensa India: Knights Variation | European Junior Chess Championship 2026 | Open | 29 | Ver |
| 8 ago 2026 | Kozlovic, Jernej 2328 | Radzimski, Antoni 2405 | 0-1 | C70 Apertura Española (Ruy López): Morphy Defense, Cozio Defense | European Junior Chess Championship 2026 | Open | 71 | Ver |
| 7 ago 2026 | Pasti, Aron 2439 | Kozlovic, Jernej 2328 | ½-½ | C64 Apertura Española (Ruy López): Classical Variation | European Junior Chess Championship 2026 | Open | 28 | Ver |
| 1 ago 2026 | Hitka, Dominik 2103 | Kozlovic, Jernej 2335 | 0-1 | B11 Defensa Caro-Kann: Two Knights Attack, Mindeno Variation | European Youth Team Chess Championship - Open18 | 38 | Ver |
| 9 jul 2026 | Kozlovic, Jernej 2222 | Rekuc, Patryk 2290 | 1-0 | B51 Defensa Siciliana: Moscow Variation | rzeszow | 46 | Ver |
| 9 jul 2026 | Rekuc, Patryk 2290 | Kozlovic, Jernej 2222 | 1-0 | B13 Defensa Caro-Kann: Exchange Variation | rzeszow | 40 | Ver |
| 9 jul 2026 | Kozlovic, Jernej 2222 | Sawicki, Dorian 2059 | 1-0 | B40 Defensa Siciliana: Delayed Alapin Variation, with e6 | rzeszow | 47 | Ver |
| 9 jul 2026 | Sawicki, Dorian 2059 | Kozlovic, Jernej 2222 | ½-½ | D02 Apertura de Peón de Dama: Krause Variation | rzeszow | 26 | Ver |
| 9 jul 2026 | Kozlovic, Jernej 2222 | Krasniewski, Maciej 2321 | ½-½ | B31 Defensa Siciliana: Nyezhmetdinov-Rossolimo Attack, Fianchetto Variation | rzeszow | 44 | Ver |
| 9 jul 2026 | Krasniewski, Maciej 2321 | Kozlovic, Jernej 2222 | 1-0 | D30 Gambito de Dama rehusado: Tarrasch Defense, Pseudo-Tarrasch | rzeszow | 35 | Ver |
| 9 jul 2026 | Bartodziej, Bartosz 2021 | Kozlovic, Jernej 2222 | ½-½ | C50 Apertura Italiana: Paris Defense | rzeszow | 57 | Ver |
| 9 jul 2026 | Kozlovic, Jernej 2222 | Bartodziej, Bartosz 2021 | ½-½ | C80 Apertura Española (Ruy López): Open | rzeszow | 35 | Ver |
| 8 jul 2026 | Krawczyk, Flawian 2226 | Kozlovic, Jernej 2331 | 0-1 | A13 Apertura Inglesa: Agincourt Defense, Catalan Defense | rzeszow | 30 | Ver |
| 8 jul 2026 | Kozlovic, Jernej 2331 | Cnejev, Vladimir-Alexandru 2327 | ½-½ | C63 Apertura Española (Ruy López): Schliemann Defense | rzeszow | 69 | Ver |
| 8 jul 2026 | Musial, Igor 2209 | Kozlovic, Jernej 2331 | ½-½ | C70 Apertura Española (Ruy López): Morphy Defense, Cozio Defense | rzeszow | 48 | Ver |