| Jul 10, 2026 | Kasioumis | 1–0 | Tsakiris | Round 7: Kasioumis, Vasilios - Tsakiris, Haralambos | Sicilian Defense: French Variation | |
| Jul 10, 2026 | Christodoulou | 1–0 | Tsakiris | Round 1: Christodoulou, Panagiotis - Tsakiris, Haralambos | French Defense: Classical Variation | |
| Dec 6, 2025 | Tsakiris | 0–1 | Zhao | Round 5: Tsakiris, Haralambos - Zhao, George | Queen's Gambit Declined: Exchange Variation, Positional Variation | |
| Dec 6, 2025 | Terler | ½–½ | Tsakiris | Round 4: Terler, Bohdan - Tsakiris, Haralambos | French Defense: Tarrasch Variation, Eliskases Variation | |
| Dec 6, 2025 | Tsakiris | 1–0 | Narang | Round 3: Tsakiris, Haralambos - Narang, Ishaan | Grünfeld Defense: Three Knights Variation | |
| Dec 6, 2025 | Adams | 1–0 | Tsakiris | Round 1: Adams, Robert - Tsakiris, Haralambos | Sicilian Defense: French Variation | |
| Jul 3, 2025 | Gkavardinas | 1–0 | Tsakiris | Round 2: Gkavardinas, Antonios - Tsakiris, Haralambos | Sicilian Defense: Taimanov Variation, Bastrikov Variation, English Attack | |
| Feb 22, 2025 | Tsakiris | 0–1 | Roberson | Round 8: Tsakiris, Haralambos - Roberson, Peter T | Queen's Gambit Declined: Exchange Variation, Positional Variation | |
| Feb 22, 2025 | Damodaran | 0–1 | Tsakiris | Round 7: Damodaran, Patrick - Tsakiris, Haralambos | Sicilian Defense: Accelerated Dragon, Maróczy Bind | |
| Feb 21, 2025 | Tsakiris | 1–0 | Bharat Kumar | Round 6: Tsakiris, Haralambos - Bharat Kumar, Balahari | Queen's Pawn Game: Symmetrical Variation, Pseudo-Catalan | |
| Feb 20, 2025 | Tsakiris | 1–0 | Skettos | Round 4: Tsakiris, Haralambos - Skettos, Nicolas | French Defense: Advance Variation, Euwe Variation | |
| Feb 20, 2025 | Turner | 1–0 | Tsakiris | Round 5: Turner, Matthew J - Tsakiris, Haralambos | Rapport-Jobava System | |
| Feb 19, 2025 | Patel | 0–1 | Tsakiris | Round 3: Patel, Keatan - Tsakiris, Haralambos | French Defense: Tarrasch Variation, Open System, Euwe-Keres Line | |
| Feb 18, 2025 | Tsakiris | 0–1 | Pereslavtsev | Round 2: Tsakiris, Haralambos - Pereslavtsev, Alexandr | Sicilian Defense: Delayed Alapin Variation, with e6 | |
| Feb 18, 2025 | Maton | ½–½ | Tsakiris | Round 1: Maton, Emily - Tsakiris, Haralambos | Queen's Pawn Game: Barry Attack | |
| Jul 7, 2024 | Papasimakopoulos | 1–0 | Tsakiris | Greek League 2024 | Slav Defense: Breyer Variation | |
| Jul 5, 2024 | Krallis | 1–0 | Tsakiris | Greek League 2024 | Petrov's Defense: Three Knights Game | |
| Aug 17, 2022 | Tsakiris | 0–1 | Kelires | National Greek Team Championship | Nimzo-Indian Defense: Normal Variation, Ragozin Variation | |
| Aug 15, 2022 | Tsakiris | 0–1 | Mitsis | National Greek Team Championship | Queen's Gambit Declined: Harrwitz Attack, Fianchetto Defense | |
| Aug 13, 2022 | Tsakiris | 0–1 | Kalogeris | National Greek Team Championship | Nimzo-Indian Defense: Three Knights Variation | |
| Aug 12, 2022 | Giannoulakis | 1–0 | Tsakiris | National Greek Team Championship | Slav Defense: Breyer Variation | |
| — | Tsakiris | ½–½ | Sideris | National Greek Team Championship | Modern Defense: Averbakh System | |