| Apr 20, 2026 | Diamantidis | 1–0 | Seretis | Round 9: Diamantidis, Stamatios - Seretis, Anastasios | Sicilian Defense: Taimanov Variation | |
| Apr 19, 2026 | Paterakis | 0–1 | Diamantidis | Round 8: Paterakis, Panagiotis Emm - Diamantidis, Stamatios | Bogo-Indian Defense: Grünfeld Variation | |
| Apr 18, 2026 | Chompas | 1–0 | Diamantidis | Round 6: Chompas, Vasileios - Diamantidis, Stamatios | Zukertort Opening: Queen's Gambit Invitation | |
| Apr 18, 2026 | Diamantidis | 1–0 | Iliopoulos | Round 7: Diamantidis, Stamatios - Iliopoulos, Panagiotis | French Defense: Rubinstein Variation, Blackburne Defense | |
| Apr 17, 2026 | Diamantidis | ½–½ | Skarlas | Round 5: Diamantidis, Stamatios - Skarlas, Vasileios | Scotch Game: Schmidt Variation | |
| Apr 17, 2026 | Zafeiriou | 0–1 | Diamantidis | Round 4: Zafeiriou, Maximos - Diamantidis, Stamatios | Italian Game: Scotch Gambit, Max Lange Attack | |
| Apr 16, 2026 | Diamantidis | 1–0 | Michas | Round 3: Diamantidis, Stamatios - Michas, Iasonas | Italian Game: Giuoco Pianissimo, Normal | |
| Apr 15, 2026 | Tsagkas | 1–0 | Diamantidis | Round 2: Tsagkas, Odysseas - Diamantidis, Stamatios | Bogo-Indian Defense: Wade-Smyslov Variation | |
| Jan 6, 2026 | Diamantidis | 1–0 | Karantoniou | Round 6: Diamantidis, Stamatios - Karantoniou, Stylianos | Queen's Indian Defense: Miles Variation | |
| Jan 5, 2026 | Diamantidis | 1–0 | Ieromonachos | Round 5: Diamantidis, Stamatios - Ieromonachos, Dimitrios Nektarios | Sicilian Defense: Delayed Alapin Variation, with e6 | |
| Jan 4, 2026 | Ilias | 1–0 | Diamantidis | Round 4: Ilias, Nikolaos - Diamantidis, Stamatios | Slav Defense | |
| Jan 3, 2026 | Diamantidis | 1–0 | Tsagkas | Round 3: Diamantidis, Stamatios - Tsagkas, Odysseas | Caro-Kann Defense: Exchange Variation | |
| Jan 3, 2026 | Damalas | ½–½ | Diamantidis | Round 2: Damalas, Ioannis - Diamantidis, Stamatios | Slav Defense: Exchange Variation, Symmetrical Line | |
| Dec 31, 2025 | Stergatos | 1–0 | Diamantidis | Round 7: Stergatos, Dimitrios - Diamantidis, Stamatios | Catalan Opening: Closed | |
| Apr 27, 2025 | Diamantidis | 0–1 | Pitsinos | Round 7: Diamantidis, Stamatios - Pitsinos, Evangelos | Four Knights Game: Spanish Variation, Double Spanish | |
| Apr 26, 2025 | Sotirakopoulos | 1–0 | Diamantidis | Round 6: Sotirakopoulos, Panagiotis - Diamantidis, Stamatios | Bishop's Opening: Vienna Hybrid, Hromádka Variation | |
| Apr 25, 2025 | Diamantidis | * | Matthaiou | Round 5: Diamantidis, Stamatios - Matthaiou, Theodoros | Caro-Kann Defense | |
| Apr 24, 2025 | Vasilopoulos | ½–½ | Diamantidis | Round 4: Vasilopoulos, Georgios Th - Diamantidis, Stamatios | Queen's Gambit Declined | |
| Apr 23, 2025 | Diamantidis | 1–0 | Karvountzis | Round 3: Diamantidis, Stamatios - Karvountzis, Ioannis Chrysostomos | Four Knights Game | |
