| Mar 14, 2024 | Krallis | 1–0 | Theoharidis | Round 1: Krallis, Christos - Theoharidis, Georgios | Zukertort Opening: Queen's Gambit Invitation | |
| Aug 9, 2022 | Deli | 0–1 | Theoharidis | Thessaloniki Open | A | Dutch Defense: Staunton Gambit | |
| Aug 6, 2022 | Theoharidis | ½–½ | Gogolis | Thessaloniki Open | A | Caro-Kann Defense: Tartakower Variation | |
| Aug 5, 2022 | Skembris | 1–0 | Theoharidis | Thessaloniki Open | A | Dutch Defense: Leningrad Variation, Warsaw Variation | |
| Aug 4, 2022 | Theoharidis | 0–1 | Durak | Thessaloniki Open | A | Italian Game: Evans Gambit, Tartakower Attack | |
| Aug 4, 2022 | Theoharidis | 1–0 | Banov | Thessaloniki Open | A | Modern Defense | |
| Aug 3, 2022 | Kosmidis | 0–1 | Theoharidis | Thessaloniki Open | A | Dutch Defense: Semi-Leningrad Variation | |
| Aug 8, 2021 | Betsakos | * | Theoharidis | 30th OPEN Chess International Tournament | ? | |
| Aug 7, 2021 | Theoharidis | * | Townsend | 30th OPEN Chess International Tournament | ? | |
| Aug 6, 2021 | Ballas | * | Theoharidis | 30th OPEN Chess International Tournament | ? | |
| Aug 5, 2021 | Theoharidis | * | Deli | 30th OPEN Chess International Tournament | ? | |
| Aug 4, 2021 | Schnelzer | * | Theoharidis | 30th OPEN Chess International Tournament | ? | |
| Aug 3, 2021 | Alexakis | * | Theoharidis | 30th OPEN Chess International Tournament | ? | |
| Aug 2, 2021 | Theoharidis | * | Nikanova | 30th OPEN Chess International Tournament | ? | |
| Aug 2, 2021 | Klimentov | * | Theoharidis | 30th OPEN Chess International Tournament | ? | |
| Aug 1, 2021 | Theoharidis | * | Sirigos | 30th OPEN Chess International Tournament | ? | |
| — | Theoharidis | 1–0 | Balafoutas | Round 1: Theoharidis, Georgios - Balafoutas, Dimitrios | Sicilian Defense: Prins Variation | |
| — | Theoharidis | 1–0 | Fan | Round 3: Theoharidis, Georgios - Fan, Shuhan | Queen's Pawn Game: London System | |
| — | Theoharidis | 1–0 | Mitsopoulos | Round 5: Theoharidis, Georgios - Mitsopoulos, Ioannis | Caro-Kann Defense: Classical Variation, Main Line | |
| — | Theoharidis | 1–0 | Tsakiris | Round 7: Theoharidis, Georgios - Tsakiris, Sotirios | Caro-Kann Defense: Tartakower Variation | |
| — | Theoharidis | 0–1 | Stamatiadis | Round 9: Theoharidis, Georgios - Stamatiadis, Georgios | Vienna Game: Falkbeer Variation | |
| — | Saltkhutsishvili | 1–0 | Theoharidis | Round 2: Saltkhutsishvili, Sara - Theoharidis, Georgios | French Defense: Tarrasch Variation | |
| — | Aral | ½–½ | Theoharidis | Round 4: Aral, Tunc - Theoharidis, Georgios | French Defense: Advance Variation, Main Line | |
| — | Khymchenko | 1–0 | Theoharidis | Round 6: Khymchenko, Maksym - Theoharidis, Georgios | French Defense: Advance Variation | |
| — | Papadopoulos | 1–0 | Theoharidis | Round 8: Papadopoulos, Alexadros Paris - Theoharidis, Georgios | Nimzo-Indian Defense: Classical Variation, Milner-Barry Variation | |
