| Jun 14, 2026 | Diamantidis | 0–1 | Mastrovasilis | Round 2: Diamantidis, Sotirios - Mastrovasilis, Athanasios | Sicilian Defense: Kan Variation, Maróczy Bind, Réti Variation | |
| Apr 18, 2026 | Seretis | 0–1 | Diamantidis | Round 6: Seretis, Anastasios - Diamantidis, Sotirios | Sicilian Defense: Taimanov Variation | |
| Apr 18, 2026 | Diamantidis | ½–½ | Skarlas | Round 7: Diamantidis, Sotirios - Skarlas, Vasileios | Ruy Lopez: Morphy Defense | |
| Apr 17, 2026 | Diamantidis | ½–½ | Kiryttopoulos | Round 5: Diamantidis, Sotirios - Kiryttopoulos, Ioannis | Sicilian Defense: Four Knights Variation, Exchange Variation | |
| Apr 17, 2026 | Koutroupas | 0–1 | Diamantidis | Round 4: Koutroupas, Emmanouil - Diamantidis, Sotirios | Zukertort Opening | |
| Apr 16, 2026 | Diamantidis | 1–0 | Tsagkas | Round 3: Diamantidis, Sotirios - Tsagkas, Odysseas | Caro-Kann Defense: Classical Variation | |
| Apr 15, 2026 | Chronopoulos | 0–1 | Diamantidis | Round 1: Chronopoulos, Panagiotis Th - Diamantidis, Sotirios | Queen's Gambit Declined: Three Knights Variation | |
| Apr 15, 2026 | Diamantidis | ½–½ | Iliopoulos | Round 2: Diamantidis, Sotirios - Iliopoulos, Petros | French Defense: Exchange Variation | |
| Apr 9, 2026 | Oikonomopoulos | 1–0 | Diamantidis | Round 9: Oikonomopoulos, Filippos - Diamantidis, Sotirios | King's Indian Attack, with e6 | |
| Apr 9, 2026 | Anagnostopoulos | ½–½ | Diamantidis | Round 8: Anagnostopoulos, Panagiotis - Diamantidis, Sotirios | English Opening: Neo-Catalan | |
| Jan 7, 2026 | Diamantidis | 1–0 | Andreou | Round 7: Diamantidis, Sotirios - Andreou, Jonas | French Defense: Exchange Variation | |
| Jan 3, 2026 | Diamantidis | 1–0 | Kousparis | Round 3: Diamantidis, Sotirios - Kousparis, Markos | French Defense: Exchange Variation | |
| Dec 31, 2025 | Diamantidis | ½–½ | Ilias | Round 5: Diamantidis, Sotirios - Ilias, Nikolaos | Scandinavian Defense: Portuguese Gambit, Wuss Variation | |
| Dec 31, 2025 | Stergatos | ½–½ | Diamantidis | Round 2: Stergatos, Dimitrios - Diamantidis, Sotirios | Catalan Opening: Closed | |
| Dec 31, 2025 | Ieromonachos | 0–1 | Diamantidis | Round 4: Ieromonachos, Dimitrios Nektarios - Diamantidis, Sotirios | English Opening: King's English Variation | |
| Dec 31, 2025 | Michas | ½–½ | Diamantidis | Round 6: Michas, Iasonas - Diamantidis, Sotirios | Sicilian Defense: Taimanov Variation | |
| Jul 6, 2025 | Kiryttopoulos | 1–0 | Diamantidis | Round 1: Kiryttopoulos, Ioannis - Diamantidis, Sotirios | Scotch Game: Schmidt Variation | |
| Apr 27, 2025 | Diamantidis | 1–0 | Sotirakopoulos | Round 7: Diamantidis, Sotirios - Sotirakopoulos, Panagiotis | French Defense: Rubinstein Variation, Blackburne Defense | |
| Apr 26, 2025 | Diamantidis | 1–0 | Kokkalis | Round 6: Diamantidis, Sotirios - Kokkalis, Georgios Stef | Four Knights Game: Scotch Variation Accepted | |
