| Jul 4, 2025 | Kelires | ½–½ | Megalios | Round 7: Kelires, Andreas - Megalios, Konstantinos | King's Indian Attack | |
| Jul 3, 2025 | Megalios | ½–½ | Liodakis | Round 6: Megalios, Konstantinos - Liodakis, Konstantinos-Spyros | Benko Gambit Accepted: Fully Accepted Variation | |
| Jul 3, 2025 | Bozinakis | ½–½ | Megalios | Round 4: Bozinakis, Pavlos - Megalios, Konstantinos | Ruy Lopez: Morphy Defense, Steinitz Deferred | |
| Jul 3, 2025 | Megalios | ½–½ | Mastrovasilis | Round 3: Megalios, Konstantinos - Mastrovasilis, Dimitrios | Ruy Lopez: Closed, Averbakh Variation | |
| Jul 3, 2025 | Stoimenidis | 0–1 | Megalios | Round 2: Stoimenidis, Dimitrios - Megalios, Konstantinos | Indian Defense | |
| Jul 3, 2025 | Megalios | ½–½ | Bizopoulos | Round 1: Megalios, Konstantinos - Bizopoulos, Alexandros | King's Indian Defense: Petrosian Variation, Stein Defense | |
| Jul 3, 2025 | Megalios | ½–½ | Malikentzos | Round 5: Megalios, Konstantinos - Malikentzos, Sotirios | English Opening: Agincourt Defense, Catalan Defense Accepted | |
| Mar 10, 2023 | Druska | 1–0 | Megalios | European Individual Chess Championship 2023 | Italian Game: Two Knights Defense, Modern Bishop's Opening | |
| Mar 9, 2023 | Megalios | 0–1 | Alsina Leal | European Individual Chess Championship 2023 | English Opening: Symmetrical Variation, Anti-Benoni Variation | |
| Mar 8, 2023 | Gavrilescu | ½–½ | Megalios | European Individual Chess Championship 2023 | Sicilian Defense: Nyezhmetdinov-Rossolimo Attack | |
| Mar 7, 2023 | Megalios | 1–0 | Draskovic | European Individual Chess Championship 2023 | King's Indian Defense: Orthodox Variation, Positional Defense | |
| Mar 5, 2023 | Megalios | 0–1 | Rasulov | European Individual Chess Championship 2023 | Nimzo-Indian Defense: Sämisch Variation | |
| Aug 28, 2021 | Megalios | 0–1 | Grigoryan | Guimaraes Chess 2021 | King's Indian Attack: Keres Variation | |
| Aug 27, 2021 | Megalios | 1–0 | Ventura Bolet | Guimaraes Chess 2021 | King's Indian Defense: Orthodox Variation, Positional Defense, Closed Line | |
| Jul 8, 2021 | Gokcek | 0–1 | Megalios | Serbia Chess Open | Masters | ? | |
| Jul 6, 2021 | Megalios | * | Brilej | Serbia Chess Open | Masters | ? | |
| Jul 5, 2021 | Manakova | * | Megalios | Serbia Chess Open | Masters | ? | |
| Jul 4, 2021 | Megalios | ½–½ | Miszler | Serbia Chess Open | Masters | ? | |
| Jul 3, 2021 | Megalios | ½–½ | Puranik | Serbia Chess Open | Masters | King's Indian Defense: Normal Variation, King's Knight Variation | |
| Jul 3, 2021 | Postny | 1–0 | Megalios | Serbia Chess Open | Masters | Benoni Defense | |
| Jul 2, 2021 | Teuschler | 0–1 | Megalios | Serbia Chess Open | Masters | ? | |
