| Sep 14, 2023 | Antonios Gkavardinas | ½–½ | Mees Van Batenburg | Round 9: Antonios Gkavardinas - Mees Van Batenburg | Sicilian Defense: Nyezhmetdinov-Rossolimo Attack | |
| Sep 13, 2023 | Stanislao Vommaro | 0–1 | Antonios Gkavardinas | Round 8: Stanislao Vommaro - Antonios Gkavardinas | Nimzo-Larsen Attack: Modern Variation | |
| Sep 12, 2023 | Antonios Gkavardinas | 0–1 | Felix-Antonio Ilinca | Round 7: Antonios Gkavardinas - Felix-Antonio Ilinca | Sicilian Defense: Richter-Rauzer Variation, Neo-Modern Variation, Nyezhmetdinov Attack | |
| Sep 11, 2023 | Artjoms Tolmacevs | 0–1 | Antonios Gkavardinas | Round 6: Artjoms Tolmacevs - Antonios Gkavardinas | Caro-Kann Defense: Advance Variation, Short Variation | |
| Sep 9, 2023 | Antonios Gkavardinas | 1–0 | Alper Tezcan | Round 5: Antonios Gkavardinas - Alper Tezcan | French Defense: Tarrasch Variation, Closed Variation | |
| Sep 8, 2023 | Antonios Gkavardinas | 0–1 | Luca Ernst | Round 4: Antonios Gkavardinas - Luca Ernst | Sicilian Defense: Four Knights Variation, Exchange Variation | |
| Sep 7, 2023 | Rustam Rustamov | ½–½ | Antonios Gkavardinas | Round 3: Rustam Rustamov - Antonios Gkavardinas | Caro-Kann Defense: Two Knights Attack, Mindeno Variation, Exchange Line | |
| Sep 6, 2023 | Antonios Gkavardinas | 1–0 | Matei Govoreanu | Round 2: Antonios Gkavardinas - Matei Govoreanu | Sicilian Defense: Nyezhmetdinov-Rossolimo Attack, Fianchetto Variation | |
| Sep 5, 2023 | Georgios Rafail Mantazis | 0–1 | Antonios Gkavardinas | Round 1: Georgios Rafail Mantazis - Antonios Gkavardinas | Caro-Kann Defense: Exchange Variation, Rubinstein Variation | |
| Aug 30, 2023 | Antonios Gkavardinas | 1–0 | Georgios Antonioudakis | Round 7: Antonios Gkavardinas - Georgios Antonioudakis | Sicilian Defense: Richter-Rauzer Variation, Neo-Modern Variation | |
| Aug 29, 2023 | Antonios Gkavardinas | 1–0 | Stamatios Rousos | Round 1: Antonios Gkavardinas - Stamatios Rousos | Sicilian Defense: Nyezhmetdinov-Rossolimo Attack, Fianchetto Variation | |
| Aug 29, 2023 | Panormitis Christodoulou | ½–½ | Antonios Gkavardinas | Round 2: Panormitis Christodoulou - Antonios Gkavardinas | Caro-Kann Defense: Two Knights Attack, Mindeno Variation, Exchange Line | |
| Aug 29, 2023 | Antonios Gkavardinas | ½–½ | Nikolaos Kazakos | Round 4: Antonios Gkavardinas - Nikolaos Kazakos | French Defense: Tarrasch Variation, Eliskases Variation | |
| Aug 29, 2023 | Antonios Gkavardinas | 1–0 | Stavros Dimakis | Round 6: Antonios Gkavardinas - Stavros Dimakis | Sicilian Defense: Taimanov Variation, Bastrikov Variation, English Attack | |
| Aug 23, 2023 | Antonios Gkavardinas | 1–0 | Evangelos Mixakis | Semi - Finals: Antonios Gkavardinas - Evangelos Mixakis | Sicilian Defense: Dragon Variation, Fianchetto Variation | |
| Aug 18, 2023 | Jahandar Azadaliyev | 0–1 | Antonios Gkavardinas | FIDE U16 Olympiad_boards_1-80 | Queen's Gambit Declined: Charousek Variation | |
| Aug 17, 2023 | Antonios Gkavardinas | 1–0 | Asrorjon Omonov | FIDE U16 Olympiad_boards_1-80 | Caro-Kann Defense: Tartakower Variation | |
| Aug 17, 2023 | Dora Peglau | 0–1 | Antonios Gkavardinas | FIDE U16 Olympiad_boards_1-80 | Queen's Gambit Declined: Harrwitz Attack, Two Knights Defense | |
| Aug 16, 2023 | Vladyslav Fishchuk | 1–0 | Antonios Gkavardinas | FIDE U16 Olympiad_boards_1-80 | Caro-Kann Defense: Two Knights Attack, Mindeno Variation, Exchange Line | |
| Aug 15, 2023 | Antonios Gkavardinas | 1–0 | Leon Skrbec | FIDE U16 Olympiad_boards_1-80 | Sicilian Defense: Najdorf Variation, English Attack | |
| Aug 15, 2023 | Vladimir-Alexandru Cnejev | 1–0 | Antonios Gkavardinas | FIDE U16 Olympiad_boards_1-80 | Caro-Kann Defense: Advance Variation, Bayonet Attack | |
| Aug 14, 2023 | Yonathan Uritsky | 0–1 | Antonios Gkavardinas | FIDE U16 Olympiad_boards_1-80 | Zukertort Opening: Reversed Mexican Defense | |
| Aug 14, 2023 | Antonios Gkavardinas | 0–1 | Bilguun Bat | FIDE U16 Olympiad_boards_1-80 | Sicilian Defense: Najdorf Variation, English Attack | |
| Aug 13, 2023 | Antonios Gkavardinas | 1–0 | Kael Samuel Bisnath | FIDE U16 Olympiad_boards_81-124 | Italian Game: Classical Variation, Giuoco Pianissimo | |
| Jul 19, 2023 | Deepak Aaron | 1–0 | Antonios Gkavardinas | Round 4: Deepak Aaron - Antonios Gkavardinas | Queen's Gambit Declined: Harrwitz Attack, Two Knights Defense, Blockade Line | |
| Jul 9, 2023 | Antonios Gkavardinas | ½–½ | Ioannis Ntounias | Round 9: Antonios Gkavardinas - Ioannis Ntounias | Sicilian Defense: Accelerated Dragon, Maróczy Bind | |
| Jul 3, 2023 | Georgios I Drivas | 0–1 | Antonios Gkavardinas | Round 1: Georgios I Drivas - Antonios Gkavardinas | Caro-Kann Defense: Classical Variation, Lobron System | |
| Mar 8, 2022 | Yasin Chennaoui | * | Antonios Gkavardinas | Round 9: Yasin Chennaoui - Antonios Gkavardinas | ? | |
| Mar 7, 2022 | Antonios Gkavardinas | * | Kirill Makarenko | Round 8: Antonios Gkavardinas - Kirill Makarenko | ? | |
| Mar 6, 2022 | Antonios Gkavardinas | * | Dengla Aarav | Round 7: Antonios Gkavardinas - Dengla Aarav | ? | |
| Mar 5, 2022 | Tobias Kuegel | * | Antonios Gkavardinas | Round 6: Tobias Kuegel - Antonios Gkavardinas | ? | |
| Mar 5, 2022 | Kush Devnani | * | Antonios Gkavardinas | Round 5: Kush Devnani - Antonios Gkavardinas | ? | |
| Mar 4, 2022 | Antonios Gkavardinas | * | Joel Perez Bolanos | Round 4: Antonios Gkavardinas - Joel Perez Bolanos | ? | |
| Mar 3, 2022 | Artem Tytynnik | * | Antonios Gkavardinas | Round 3: Artem Tytynnik - Antonios Gkavardinas | ? | |
| Mar 2, 2022 | Antonios Gkavardinas | * | Christoph Frick | Round 2: Antonios Gkavardinas - Christoph Frick | ? | |
| Mar 1, 2022 | Meruert Kamalidenova | * | Antonios Gkavardinas | Round 1: Meruert Kamalidenova - Antonios Gkavardinas | ? | |
