| Apr 20, 2026 | Ntounias | 1–0 | Tselepis | Round 8: Ntounias, Ioannis - Tselepis, Ioannis | Sicilian Defense: Najdorf Variation, English Attack | |
| Apr 20, 2026 | Palaiologou | 1–0 | Ntounias | Round 9: Palaiologou, Apostolos - Ntounias, Ioannis | London System, with Be2 | |
| Apr 19, 2026 | Katsanis | ½–½ | Ntounias | Round 7: Katsanis, Vasileios Dim - Ntounias, Ioannis | Grünfeld Defense: Three Knights Variation | |
| Apr 18, 2026 | Stavropoulos | 0–1 | Ntounias | Round 6: Stavropoulos, Sotirios - Ntounias, Ioannis | Sicilian Defense: Taimanov Variation, Bastrikov Variation, English Attack | |
| Apr 17, 2026 | Zavrakidis | 1–0 | Ntounias | Round 4: Zavrakidis, Nikolaos - Ntounias, Ioannis | Sicilian Defense: Kan Variation, Wing Attack | |
| Apr 17, 2026 | Ntounias | 1–0 | Kiryttopoulos | Round 5: Ntounias, Ioannis - Kiryttopoulos, Panagiotis Aris | Sicilian Defense: Closed | |
| Apr 15, 2026 | Alexandri | 0–1 | Ntounias | Round 2: Alexandri, Dimitra - Ntounias, Ioannis | Nimzo-Indian Defense: St. Petersburg Variation | |
| Apr 15, 2026 | Ntounias | ½–½ | Boutikos | Round 3: Ntounias, Ioannis - Boutikos, Eleftherios | Sicilian Defense: Closed, Chameleon Variation | |
| Apr 15, 2026 | Ntounias | 1–0 | Estiadis | Round 1: Ntounias, Ioannis - Estiadis, Georgios | Caro-Kann Defense: Tartakower Variation | |
| Mar 23, 2026 | Ntounias | 0–1 | Gkavardinas | 3rd International Open Chess Tournament of Katerini Group A | Caro-Kann Defense: Endgame Offer | |
| Mar 22, 2026 | Makridis | ½–½ | Ntounias | 3rd International Open Chess Tournament of Katerini Group A | Sicilian Defense: Nyezhmetdinov-Rossolimo Attack, Fianchetto Variation | |
| Mar 21, 2026 | Tsaknakis | 1–0 | Ntounias | 3rd International Open Chess Tournament of Katerini Group A | Sicilian Defense: Taimanov Variation, Bastrikov Variation, English Attack | |
| Nov 30, 2025 | Theodoridis | ½–½ | Ntounias | Round 6: Theodoridis, Charalampos - Ntounias, Ioannis | English Opening: Four Knights System, Nimzowitsch Variation | |
| Nov 29, 2025 | Ntounias | 1–0 | Giannopoulos | Round 5: Ntounias, Ioannis - Giannopoulos, Vasileios | Owen Defense | |
| Nov 28, 2025 | Diakoloukas | 0–1 | Ntounias | Round 2: Diakoloukas, Theodosios - Ntounias, Ioannis | Sicilian Defense: Grand Prix Attack | |
| Sep 9, 2025 | Tsomis | 0–1 | Ntounias | Round 9: Tsomis, Dimitrios - Ntounias, Ioannis | Sicilian Defense: Taimanov Variation, Szén Variation | |
| Sep 8, 2025 | Ntounias | 0–1 | Palaiologou | Round 8: Ntounias, Ioannis - Palaiologou, Apostolos | Sicilian Defense: Kalashnikov Variation | |
| Sep 7, 2025 | Papadopoulos | 0–1 | Ntounias | Round 7: Papadopoulos, Antonios Ioan - Ntounias, Ioannis | Queen's Indian Defense: Fianchetto Variation, Traditional Line | |
| Sep 6, 2025 | Ntounias | ½–½ | Kastis | Round 6: Ntounias, Ioannis - Kastis, Fotis | Scandinavian Defense: Main Line, Mieses Variation | |
| Sep 4, 2025 | Sklavounos | ½–½ | Ntounias | Round 4: Sklavounos, Panayotis - Ntounias, Ioannis | Sicilian Defense: Taimanov Variation | |
| Sep 2, 2025 | Avagianos | 0–1 | Ntounias | Round 2: Avagianos, Simeon - Ntounias, Ioannis | Sicilian Defense: Smith-Morra Gambit Accepted | |
| Sep 1, 2025 | Ntounias | 1–0 | Nikoleris | Round 1: Ntounias, Ioannis - Nikoleris, Evangelos | Scandinavian Defense: Bronstein Variation | |
| Aug 28, 2025 | Ntounias | ½–½ | Krallis | Round 3: Ntounias, Ioannis - Krallis, Christos | Sicilian Defense: Boleslavsky Variation | |
| Jul 12, 2025 | Ntounias | ½–½ | Theodoridis | Round 9: Ntounias, Ioannis - Theodoridis, Charalampos | Italian Game: Giuoco Pianissimo, Normal | |
| Jul 11, 2025 | Mylonakis | ½–½ | Ntounias | Round 8: Mylonakis, Ioannis - Ntounias, Ioannis | King's Indian Defense: Orthodox Variation, Bayonet Attack | |
| Jul 10, 2025 | Ntounias | ½–½ | Giannopoulos | Round 7: Ntounias, Ioannis - Giannopoulos, Vasileios | Sicilian Defense: Accelerated Dragon, Maróczy Bind | |
| Jul 10, 2025 | Lafkidis | ½–½ | Ntounias | Round 6: Lafkidis, Apostolos - Ntounias, Ioannis | Indian Defense: Anti-Nimzo-Indian | |
| Jul 8, 2025 | Mavridis | ½–½ | Ntounias | Round 4: Mavridis, Emmanouil - Ntounias, Ioannis | Queen's Indian Defense: Capablanca Variation | |
| Jul 8, 2025 | Ntounias | 1–0 | Kiryttopoulos | Round 3: Ntounias, Ioannis - Kiryttopoulos, Panagiotis Aris | Sicilian Defense: Boleslavsky Variation | |
| Jul 7, 2025 | Stralis | 0–1 | Ntounias | Round 2: Stralis, Georgios - Ntounias, Ioannis | Sicilian Defense: Nyezhmetdinov-Rossolimo Attack | |
| Jul 6, 2025 | Ntounias | 1–0 | Antonakis | Round 1: Ntounias, Ioannis - Antonakis, Leonidas | French Defense: Tarrasch Variation, Closed Variation | |
| Jul 6, 2025 | Ntounias | 0–1 | Karakasidis | Round 5: Ntounias, Ioannis - Karakasidis, Michail | Sicilian Defense: Taimanov Variation, Bastrikov Variation | |
| Sep 9, 2024 | Kakadelis | 0–1 | Ntounias | 31ο OPEN ΣΚΑΚΙΣΤΙΚΟ ΤΟΥΡΝΟΥΑ ΝΙΚΑΙΑΣ \"ΤΙΜΗ ΣΤΗΝ ΕΘΝΙΚΗ ΑΝΤΙΣΤΑΣΗ\" A GROUP | English Opening: King's English Variation, Four Knights Variation, Korchnoi Line | |
| Sep 7, 2024 | Ntounias | 0–1 | Mylonakis | 31ο OPEN ΣΚΑΚΙΣΤΙΚΟ ΤΟΥΡΝΟΥΑ ΝΙΚΑΙΑΣ \"ΤΙΜΗ ΣΤΗΝ ΕΘΝΙΚΗ ΑΝΤΙΣΤΑΣΗ\" A GROUP | Caro-Kann Defense: Tartakower Variation | |
| Sep 6, 2024 | Tzortzatos | ½–½ | Ntounias | 31ο OPEN ΣΚΑΚΙΣΤΙΚΟ ΤΟΥΡΝΟΥΑ ΝΙΚΑΙΑΣ \"ΤΙΜΗ ΣΤΗΝ ΕΘΝΙΚΗ ΑΝΤΙΣΤΑΣΗ\" A GROUP | Sicilian Defense: Accelerated Dragon, Maróczy Bind | |
| Sep 4, 2024 | Poulos | 1–0 | Ntounias | 31ο OPEN ΣΚΑΚΙΣΤΙΚΟ ΤΟΥΡΝΟΥΑ ΝΙΚΑΙΑΣ \"ΤΙΜΗ ΣΤΗΝ ΕΘΝΙΚΗ ΑΝΤΙΣΤΑΣΗ\" A GROUP | Sicilian Defense: Accelerated Dragon, Modern Variation | |
| Sep 3, 2024 | Ntounias | 1–0 | Giatrakos | 31ο OPEN ΣΚΑΚΙΣΤΙΚΟ ΤΟΥΡΝΟΥΑ ΝΙΚΑΙΑΣ \"ΤΙΜΗ ΣΤΗΝ ΕΘΝΙΚΗ ΑΝΤΙΣΤΑΣΗ\" A GROUP | Sicilian Defense: Lasker-Pelikan Variation, Sveshnikov Variation, Novosibirsk Variation | |
| Jun 28, 2024 | Ntounias | 0–1 | Palaiologou | Round 9: Ntounias, Ioannis - Palaiologou, Apostolos | Sicilian Defense: Najdorf Variation, Opocensky Variation | |
| Jun 27, 2024 | Pitsakis | 1–0 | Ntounias | Round 8: Pitsakis, Ilias - Ntounias, Ioannis | Indian Defense: Knights Variation | |
| Jun 26, 2024 | Ntounias | ½–½ | Skodras | Round 7: Ntounias, Ioannis - Skodras, Marios Konstantinos | Caro-Kann Defense: Classical Variation | |
| Jun 25, 2024 | Boutikos | ½–½ | Ntounias | Round 6: Boutikos, Eleftherios - Ntounias, Ioannis | Sicilian Defense: Dragon Variation, Classical Variation | |
| Jun 25, 2024 | Ntounias | 0–1 | Vassis | Round 5: Ntounias, Ioannis - Vassis, Michail | Caro-Kann Defense: Main Line | |
| Jun 24, 2024 | Kiryttopoulos | ½–½ | Ntounias | Round 4: Kiryttopoulos, Panagiotis Aris - Ntounias, Ioannis | English Opening: Neo-Catalan | |
| Jun 23, 2024 | Ntounias | 1–0 | Latifis | Round 3: Ntounias, Ioannis - Latifis, Panagiotis | Sicilian Defense: Dragon Variation, Yugoslav Attack, Modern Line | |
| Jun 23, 2024 | Spiliotopoulos | 0–1 | Ntounias | Round 2: Spiliotopoulos, Spyridon - Ntounias, Ioannis | Sicilian Defense: Mengarini Variation | |
| Jun 22, 2024 | Ntounias | 1–0 | Papadopoulos | Round 1: Ntounias, Ioannis - Papadopoulos, Prodromos NA | Sicilian Defense: Four Knights Variation | |
| May 12, 2024 | Makrylakis | 1–0 | Ntounias | Round 7: Makrylakis, Iason - Ntounias, Ioannis | Sicilian Defense: Alapin Variation | |
| May 11, 2024 | Ntounias | 1–0 | Karvountzis | Round 6: Ntounias, Ioannis - Karvountzis, Ioannis Chrysostomos | Italian Game: Two Knights Defense, Modern Bishop's Opening | |
| May 10, 2024 | Lafkidis | ½–½ | Ntounias | Round 5: Lafkidis, Apostolos - Ntounias, Ioannis | Sicilian Defense: Accelerated Dragon, Maróczy Bind, Breyer Variation | |
| May 9, 2024 | Ntounias | 1–0 | Natzari-Omintkach | Round 4: Ntounias, Ioannis - Natzari-Omintkach, Sorous | Italian Game: Giuoco Piano | |
| May 8, 2024 | Karanasos | 0–1 | Ntounias | Round 3: Karanasos, Vasileios - Ntounias, Ioannis | Sicilian Defense: Modern Variations | |
| May 8, 2024 | Ntounias | ½–½ | Papadopoulos | Round 2: Ntounias, Ioannis - Papadopoulos, Prodromos NA | Sicilian Defense: Four Knights Variation | |
| May 7, 2024 | Plakas | 0–1 | Ntounias | Round 1: Plakas, Dias - Ntounias, Ioannis | Sicilian Defense: Closed | |
| Aug 4, 2024 | Dal | 1–0 | Ntounias | Round 8: Dal, Emir Saygin - Ntounias, Ioannis | Nimzo-Indian Defense: St. Petersburg Variation | |
| Aug 17, 2022 | Ntounias | 1–0 | Gkavardinas | National Greek Team Championship | King's Pawn Game | |
| Aug 16, 2022 | Balafoutas | 0–1 | Ntounias | National Greek Team Championship | Sicilian Defense: Hyperaccelerated Dragon | |
| Aug 15, 2022 | Ntounias | 1–0 | Papakyriakou | National Greek Team Championship | French Defense: Advance Variation, Euwe Variation | |
| Aug 14, 2022 | Lafkidis | 1–0 | Ntounias | National Greek Team Championship | Scotch Game: Schmidt Variation | |
| Aug 13, 2022 | Ntounias | 0–1 | Palaiologou | National Greek Team Championship | Sicilian Defense: Najdorf Variation, Opocensky Variation | |
| Aug 13, 2022 | Oikonomopoulos | 1–0 | Ntounias | National Greek Team Championship | Nimzo-Indian Defense: St. Petersburg Variation | |
| — | Ntounias | 1–0 | Rosh Jain | Round 2: Ntounias, Ioannis - Rosh Jain | Philidor Defense: Lion Variation | |
| — | Ntounias | ½–½ | Leftheriotis | Round 5: Ntounias, Ioannis - Leftheriotis, Alexandros | Sicilian Defense: Najdorf Variation, Opocensky Variation, Traditional Line | |
| — | Ntounias | ½–½ | Tsaknakis | Round 6: Ntounias, Ioannis - Tsaknakis, Zisis | Italian Game: Classical Variation, Giuoco Pianissimo | |
| — | Ntounias | 0–1 | Nikolaou | Round 8: Ntounias, Ioannis - Nikolaou, Georgios | Sicilian Defense: Taimanov Variation, Bastrikov Variation | |
| — | Katikaridis | 0–1 | Ntounias | National Greek Team Championship | English Opening: Anglo-Indian Defense | |
| — | Skembris | ½–½ | Ntounias | Round 1: Skembris, Spyridon - Ntounias, Ioannis | Queen's Indian Defense: Classical Variation | |
| — | Trimitzios | 1–0 | Ntounias | Round 3: Trimitzios, Petros - Ntounias, Ioannis | Catalan Opening: Closed | |
| — | Kormas | 0–1 | Ntounias | Round 4: Kormas, Georgios - Ntounias, Ioannis | Sicilian Defense: Delayed Alapin Variation, with e6 | |
| — | Magkalakis | ½–½ | Ntounias | Round 7: Magkalakis, Stefanos - Ntounias, Ioannis | Queen's Indian Defense: Fianchetto Variation, Traditional Line | |
| — | Chiu | 0–1 | Ntounias | Round 9: Chiu, David Zion - Ntounias, Ioannis | ? | |