| Jun 14, 2026 | Kassios | 0–1 | Mastrovasilis | Round 9: Kassios, Dimitrios - Mastrovasilis, Athanasios | Ruy Lopez: Classical Variation | |
| Jun 14, 2026 | Mastrovasilis | 1–0 | Goutoufas | Round 8: Mastrovasilis, Athanasios - Goutoufas, Christos | King's Indian Defense: Orthodox Variation, Gligoric-Taimanov System | |
| Jun 14, 2026 | Mastrovasilis | 1–0 | Prezerakos | Round 7: Mastrovasilis, Athanasios - Prezerakos, Dimitrios | Tarrasch Defense: Symmetrical Variation | |
| Jun 14, 2026 | Georgiadis | ½–½ | Mastrovasilis | Round 6: Georgiadis, Anastasios - Mastrovasilis, Athanasios | Queen's Gambit Declined: Queen's Knight Variation | |
| Jun 14, 2026 | Mastrovasilis | 1–0 | Vassis | Round 5: Mastrovasilis, Athanasios - Vassis, Michail | Grünfeld Defense: Three Knights Variation, Petrosian System | |
| Jun 14, 2026 | Kofidis | 0–1 | Mastrovasilis | Round 4: Kofidis, Andreas - Mastrovasilis, Athanasios | Sicilian Defense: Accelerated Dragon, Maróczy Bind | |
| Jun 14, 2026 | Mastrovasilis | 1–0 | Gogolis | Round 3: Mastrovasilis, Athanasios - Gogolis, Alexandros | Slav Defense: Exchange Variation | |
| Jun 14, 2026 | Diamantidis | 0–1 | Mastrovasilis | Round 2: Diamantidis, Sotirios - Mastrovasilis, Athanasios | Sicilian Defense: Kan Variation, Maróczy Bind, Réti Variation | |
| Jun 14, 2026 | Mastrovasilis | 1–0 | Megagiannis | Round 1: Mastrovasilis, Athanasios - Megagiannis, Maximos | King's Indian Defense | |
| May 10, 2026 | Mastrovasilis | ½–½ | Enchev | Round 10: Mastrovasilis, Athanasios - Enchev, Ivajlo | Nimzo-Indian Defense: Normal Variation, Classical Defense | |
| May 10, 2026 | Hulka | ½–½ | Mastrovasilis | Round 9: Hulka, Valentyn - Mastrovasilis, Athanasios | English Opening: Agincourt Defense, Neo-Catalan Declined | |
| May 10, 2026 | Mastrovasilis | 1–0 | Toma | Round 8: Mastrovasilis, Athanasios - Toma, Radu-Cristian | Queen's Gambit Accepted: Central Variation, Alekhine System | |
| May 10, 2026 | Mamedov | 1–0 | Mastrovasilis | Round 7: Mamedov, Rauf - Mastrovasilis, Athanasios | Italian Game: Classical Variation, Greco Gambit, Traditional Line | |
| May 10, 2026 | Mastrovasilis | 1–0 | Padurariu | Round 6: Mastrovasilis, Athanasios - Padurariu, Mihai-Edward | Tarrasch Defense | |
| May 10, 2026 | Kanakaris | ½–½ | Mastrovasilis | Round 5: Kanakaris, Georgios - Mastrovasilis, Athanasios | Trompowsky Attack: Classical Defense | |
| May 9, 2026 | Mastrovasilis | 1–0 | Nastore | Round 4: Mastrovasilis, Athanasios - Nastore, Pavel-Alexandru | Queen's Gambit Declined: Anti-Tartakower Variation | |
| May 9, 2026 | Halilovic | 0–1 | Mastrovasilis | Round 3: Halilovic, Fahrudin - Mastrovasilis, Athanasios | Sicilian Defense: Grand Prix Attack | |
| May 9, 2026 | Mastrovasilis | 1–0 | Dinca | Round 2: Mastrovasilis, Athanasios - Dinca, Radu | Nimzo-Indian Defense: St. Petersburg Variation | |
| May 9, 2026 | David | 0–1 | Mastrovasilis | Round 1: David, Alexandru - Mastrovasilis, Athanasios | Indian Defense: Anti-Nimzo-Indian | |
| Dec 11, 2025 | Alexakis | ½–½ | Mastrovasilis | Round 9: Alexakis, Dimitris - Mastrovasilis, Athanasios | Italian Game: Evans Gambit, Tartakower Attack | |
| Dec 10, 2025 | Mastrovasilis | 1–0 | Tsarsitalidis | Round 8: Mastrovasilis, Athanasios - Tsarsitalidis, Konstantinos | Pseudo Queen's Indian Defense | |
| Dec 9, 2025 | Krallis | ½–½ | Mastrovasilis | Round 7: Krallis, Christos - Mastrovasilis, Athanasios | Italian Game: Giuoco Pianissimo, Normal | |
| Dec 8, 2025 | Mastrovasilis | ½–½ | Kotronias | Round 6: Mastrovasilis, Athanasios - Kotronias, Vasilios | King's Indian Attack: Symmetrical Defense | |
| Dec 7, 2025 | Kourkoulos-Arditis | 1–0 | Mastrovasilis | Round 5: Kourkoulos-Arditis, Stamatis - Mastrovasilis, Athanasios | Italian Game: Classical Variation, Giuoco Pianissimo | |
| Dec 6, 2025 | Mastrovasilis | 0–1 | Ioannidis | Round 4: Mastrovasilis, Athanasios - Ioannidis, Evgenios | Queen's Gambit Declined: Traditional Variation | |
| Dec 5, 2025 | Kalogridis | 0–1 | Mastrovasilis | Round 3: Kalogridis, Antonios - Mastrovasilis, Athanasios | Semi-Slav Defense | |
| Dec 4, 2025 | Mastrovasilis | 1–0 | Patrelakis | Round 2: Mastrovasilis, Athanasios - Patrelakis, Evaggelos | Nimzo-Indian Defense: Normal Variation, Botvinnik System | |
| Dec 2, 2025 | Mastrovasilis | ½–½ | Nikolaidis | Round 1: Mastrovasilis, Athanasios - Nikolaidis, Ioannis | Nimzo-Indian Defense: St. Petersburg Variation, Fischer Variation | |
| Nov 24, 2025 | Papadimitriou | 0–1 | Mastrovasilis | 2nd Gavriil Mastrovasilis Memorial Rapid 2025 | King's Indian Defense: Makogonov Variation | |
| Nov 24, 2025 | Sidiras | 0–1 | Mastrovasilis | 2nd Gavriil Mastrovasilis Memorial Rapid 2025 | Zukertort Opening | |
| Nov 24, 2025 | Mastrovasilis | 1–0 | Spirliadis | 2nd Gavriil Mastrovasilis Memorial Rapid 2025 | Indian Defense: Wade-Tartakower Defense | |
| Nov 24, 2025 | Mastrovasilis | ½–½ | Mastrovasilis | 2nd Gavriil Mastrovasilis Memorial Rapid 2025 | Queen's Indian Defense: Yates Variation | |
| Nov 24, 2025 | Mastrovasilis | 1–0 | Seretis | 2nd Gavriil Mastrovasilis Memorial Rapid 2025 | Queen's Gambit Declined: Anti-Tartakower Variation | |
| Nov 22, 2025 | Mastrovasilis | 1–0 | Koutroupas | 2nd Gavriil Mastrovasilis Memorial Rapid 2025 | Sicilian Defense: Modern Variations, Main Line | |
| Nov 15, 2025 | Yermolinsky | 1–0 | Mastrovasilis | Round 9: Yermolinsky, Alex - Mastrovasilis, Athanasios | Ruy Lopez: Morphy Defense, Steinitz Deferred | |
| Nov 14, 2025 | Mastrovasilis | 0–1 | Annaberdiyev | Round 8: Mastrovasilis, Athanasios - Annaberdiyev, Meylis | Nimzo-Indian Defense: Romanishin Variation | |
| Nov 13, 2025 | Mastrovasilis | 1–0 | Zeynalli | Round 7: Mastrovasilis, Athanasios - Zeynalli, Rashad | Indian Defense: Spielmann-Indian | |
| Nov 12, 2025 | Mastrovasilis | ½–½ | Ulybin | Round 5: Mastrovasilis, Athanasios - Ulybin, Mikhail | Queen's Gambit Declined: Austrian Defense | |
| Nov 11, 2025 | Gunebakan | 0–1 | Mastrovasilis | Round 4: Gunebakan, Yunus Emre - Mastrovasilis, Athanasios | Sicilian Defense: Kan Variation, Wing Attack | |
| Nov 10, 2025 | Mastrovasilis | ½–½ | Turksoi | Round 3: Mastrovasilis, Athanasios - Turksoi, Zhanpolat | Queen's Pawn Game: Accelerated London System, Steinitz Countergambit | |
| Nov 10, 2025 | Binboga | 0–1 | Mastrovasilis | Round 2: Binboga, Yaman - Mastrovasilis, Athanasios | Queen's Gambit Declined | |
| Nov 9, 2025 | Mastrovasilis | ½–½ | Hosseinzadeh | Round 1: Mastrovasilis, Athanasios - Hosseinzadeh, Nima | Queen's Pawn Game: Colle System | |
| Nov 9, 2025 | Tahbaz | ½–½ | Mastrovasilis | Round 6: Tahbaz, Arash - Mastrovasilis, Athanasios | King's Indian Attack | |
| Jan 6, 2025 | Mastrovasilis | 1–0 | Nemtsas | Round 7: Mastrovasilis, Athanasios - Nemtsas, Hristoforos | King's Indian Defense: Normal Variation | |
| Jan 5, 2025 | Vassis | ½–½ | Mastrovasilis | Round 6: Vassis, Michail - Mastrovasilis, Athanasios | Torre Attack: Classical Defense | |
| Jan 4, 2025 | Mastrovasilis | 1–0 | Kaforos | Round 5: Mastrovasilis, Athanasios - Kaforos, Dimitrios-Alkis | English Opening: Caro-Kann Defensive System | |
| Jan 3, 2025 | Deligiannis | 0–1 | Mastrovasilis | Round 4: Deligiannis, Christos Nikolaos - Mastrovasilis, Athanasios | Catalan Opening | |
| Jul 10, 2024 | Mastrovasilis | 1–0 | Tsaknakis | Greek League 2024 | Indian Defense: Przepiorka Variation | |
| Jul 9, 2024 | Bozinakis | ½–½ | Mastrovasilis | Greek League 2024 | Caro-Kann Defense: Forgacs Variation | |
| Jul 8, 2024 | Mastrovasilis | 1–0 | Gkoumas | Greek League 2024 | Nimzo-Indian Defense: Three Knights Variation | |
| Jul 7, 2024 | Papakonstantinou | 1–0 | Mastrovasilis | Greek League 2024 | Ruy Lopez: Morphy Defense, Steinitz Deferred | |
| Jul 6, 2024 | Mastrovasilis | 0–1 | Alexakis | Greek League 2024 | Indian Defense: Pseudo-Benko | |
| Jul 5, 2024 | Hadzimanolis | 0–1 | Mastrovasilis | Greek League 2024 | Ruy Lopez: Morphy Defense, Classical Defense Deferred | |
| Jul 5, 2024 | Mastrovasilis | 1–0 | Georgiou | Greek League 2024 | Indian Defense: Knights Variation | |
| May 2, 2024 | Dzida | ½–½ | Mastrovasilis | Round 9: Dzida, Kamil - Mastrovasilis, Athanasios | Queen's Gambit Declined: Harrwitz Attack, Main Line | |
| May 1, 2024 | Mastrovasilis | 1–0 | Safarik | Round 8: Mastrovasilis, Athanasios - Safarik, Jakub | Rubinstein Opening | |
| Apr 30, 2024 | Mastrovasilis | ½–½ | Agdelen | Round 7: Mastrovasilis, Athanasios - Agdelen, Huseyin Can | Catalan Opening: Open Defense, Classical Line | |
| Apr 29, 2024 | Colijn | ½–½ | Mastrovasilis | Round 6: Colijn, Stefan - Mastrovasilis, Athanasios | Rapport-Jobava System | |
| Apr 29, 2024 | Mastrovasilis | 1–0 | Levi | Round 5: Mastrovasilis, Athanasios - Levi, Netanel | Indian Defense: Przepiorka Variation | |
| Apr 28, 2024 | Markidis | ½–½ | Mastrovasilis | Round 4: Markidis, Konstantinos - Mastrovasilis, Athanasios | Sicilian Defense: French Variation | |
| Apr 27, 2024 | Leftheriotis | ½–½ | Mastrovasilis | Round 3: Leftheriotis, Alexandros - Mastrovasilis, Athanasios | Caro-Kann Defense: Advance Variation, Botvinnik-Carls Defense | |
| Apr 26, 2024 | Mastrovasilis | 1–0 | Zhdanov | Round 1: Mastrovasilis, Athanasios - Zhdanov, Petr | Indian Defense: Knights Variation | |
| Dec 30, 2024 | Mastrovasilis | 1–0 | Panopoulos | Round 3: Mastrovasilis, Athanasios - Panopoulos, Ioannis | Grünfeld Defense: Three Knights Variation, Petrosian System | |
| Dec 29, 2024 | Peppas | 0–1 | Mastrovasilis | Round 2: Peppas, Stamatis - Mastrovasilis, Athanasios | English Opening: King's English Variation | |
| Dec 28, 2024 | Mastrovasilis | 1–0 | Maltezos | Round 1: Mastrovasilis, Athanasios - Maltezos, Georgios | Slav Defense: Breyer Variation | |
| Aug 13, 2024 | Padmini | ½–½ | Mastrovasilis | Round 9: Padmini, Rout - Mastrovasilis, Athanasios | Sicilian Defense: French Variation | |
| Aug 12, 2024 | Mastrovasilis | 1–0 | Hartofylakas | Round 8: Mastrovasilis, Athanasios - Hartofylakas, Spyros | King's Indian Attack | |
| Aug 11, 2024 | Raahul V S | ½–½ | Mastrovasilis | Round 7: Raahul V S - Mastrovasilis, Athanasios | Semi-Slav Defense: Stoltz Variation | |
| Aug 10, 2024 | Argiroudis | ½–½ | Mastrovasilis | Round 6: Argiroudis, Stamatis - Mastrovasilis, Athanasios | Queen's Pawn Game: Colle System | |
| Aug 9, 2024 | Mastrovasilis | 1–0 | Nikolaidis | Round 5: Mastrovasilis, Athanasios - Nikolaidis, Konstantinos | Nimzo-Indian Defense: Normal Variation | |
| Aug 8, 2024 | Charkhalashvili | ½–½ | Mastrovasilis | Round 4: Charkhalashvili, Inga - Mastrovasilis, Athanasios | Queen's Gambit Declined: Janowski Variation | |
| Aug 7, 2024 | Mastrovasilis | 1–0 | Betsakos | Round 3: Mastrovasilis, Athanasios - Betsakos, Konstantinos | English Opening: Agincourt Defense, Catalan Defense Accepted | |
| Aug 7, 2024 | Iskos | ½–½ | Mastrovasilis | Round 2: Iskos, Alexandros - Mastrovasilis, Athanasios | Queen's Gambit Declined: Exchange Variation, Positional Variation | |
| Aug 6, 2024 | Mastrovasilis | 1–0 | Pasa | Round 1: Mastrovasilis, Athanasios - Pasa, Ahmet | Rubinstein Opening | |
| Apr 13, 2023 | Mastrovasilis | ½–½ | Kelires | Paphos | Nimzo-Indian Defense: Normal Variation, Bernstein Defense | |
| Apr 12, 2023 | Mastrovasilis | ½–½ | Basso | Paphos | Slav Defense: Exchange Variation | |
| Apr 11, 2023 | Alexakis | 0–1 | Mastrovasilis | Paphos | Four Knights Game: Spanish Variation, Nimzowitsch Variation | |
| Apr 10, 2023 | Mastrovasilis | ½–½ | Kaczur | Paphos | Nimzo-Indian Defense: Normal Variation, Gligoric System, Exchange Variation | |
| Apr 10, 2023 | David | ½–½ | Mastrovasilis | Paphos | Queen's Gambit Declined: Charousek Variation | |
| Apr 9, 2023 | Mastrovasilis | 1–0 | Alexiadis | Paphos | English Opening: King's English Variation, Four Knights Variation, Fianchetto Line | |
| Apr 8, 2023 | Mastrovasilis | 1–0 | Casagrande | Paphos | Nimzo-Indian Defense: Normal Variation | |
| Apr 8, 2023 | Colijn | 0–1 | Mastrovasilis | Paphos | Ruy Lopez: Morphy Defense, Anderssen Variation | |
| Apr 7, 2023 | Constantinou | 0–1 | Mastrovasilis | Paphos | Nimzo-Indian Defense: Kmoch Variation | |
| Mar 13, 2023 | Agdelen | ½–½ | Mastrovasilis | European Individual Chess Championship 2023 | Italian Game: Two Knights Defense, Modern Bishop's Opening | |
| Mar 12, 2023 | Mastrovasilis | 1–0 | Filip | European Championship | ? | |
| Mar 11, 2023 | Mastrovasilis | 0–1 | Vetokhin | European Individual Chess Championship 2023 | Queen's Pawn Game: Symmetrical Variation | |
| Mar 10, 2023 | Kalogeris | ½–½ | Mastrovasilis | European Individual Chess Championship 2023 | Ruy Lopez: Berlin Defense, Rio Gambit Accepted | |
| Mar 5, 2023 | Mastrovasilis | 0–1 | Secheres | European Individual Chess Championship 2023 | King's Indian Defense: Fianchetto Variation, Panno Variation | |
| Mar 4, 2023 | Barseghyan | ½–½ | Mastrovasilis | European Championship | Queen's Gambit Declined: Exchange Variation, Positional Variation | |
| Jul 8, 2022 | Mastrovasilis | 1–0 | Droin | 7th Purtichju Open | Semi-Slav Defense: Accelerated Move Order | |
| Jul 7, 2022 | Tomasi | ½–½ | Mastrovasilis | 7th Purtichju Open | Caro-Kann Defense: Tartakower Variation | |
| Jul 6, 2022 | Mastrovasilis | 1–0 | Derige Kane | 7th Purtichju Open | English Opening: Agincourt Defense, Neo-Catalan Declined | |
| Jul 5, 2022 | Yankelevich | 1–0 | Mastrovasilis | 7th Purtichju Open | Queen's Gambit Declined | |
| Jul 4, 2022 | Mastrovasilis | 1–0 | Bogdanov | 7th Purtichju Open | Queen's Gambit Accepted: Classical Defense, Main Line | |
| Jul 3, 2022 | Mastrovasilis | ½–½ | Houhou | 7th Purtichju Open | Slav Defense: Breyer Variation | |
| Jul 2, 2022 | Guien | 0–1 | Mastrovasilis | 7th Purtichju Open | English Opening: Agincourt Defense, Catalan Defense Accepted | |
| May 29, 2022 | Kadric | ½–½ | Mastrovasilis | 5th Sharjah Masters | Italian Game: Classical Variation, Giuoco Pianissimo, Main Line | |
| May 28, 2022 | Mastrovasilis | 1–0 | Al Hosani | 5th Sharjah Masters | Zukertort Opening: Sicilian Invitation | |
| May 27, 2022 | Vokhidov | 1–0 | Mastrovasilis | 5th Sharjah Masters | Ruy Lopez: Berlin Defense | |
| May 26, 2022 | Mastrovasilis | 1–0 | Assaubayeva | 5th Sharjah Masters | Indian Defense: Przepiorka Variation | |