| Jul 3, 2025 | Pavlidis | 1–0 | Mitsis | Round 1: Pavlidis, Antonios - Mitsis, Georgios | Italian Game: Two Knights Defense, Modern Bishop's Opening | |
| Jun 22, 2025 | Papadopoulos | 0–1 | Mitsis | Round 9: Papadopoulos, Georgios - Mitsis, Georgios | Ruy Lopez: Morphy Defense | |
| Jun 20, 2025 | Kapnisis | ½–½ | Mitsis | Round 7: Kapnisis, Spyridon - Mitsis, Georgios | Ruy Lopez: Open | |
| Jun 19, 2025 | Mitsis | 1–0 | Pitsakis | Round 6: Mitsis, Georgios - Pitsakis, Ilias | Sicilian Defense: Moscow Variation | |
| Jun 18, 2025 | Vassis | ½–½ | Mitsis | Round 5: Vassis, Michail - Mitsis, Georgios | Torre Attack: Classical Defense | |
| Jun 17, 2025 | Mitsis | 1–0 | Nemtsas | Round 4: Mitsis, Georgios - Nemtsas, Hristoforos | Queen's Pawn Game: Modern Defense | |
| Jun 16, 2025 | Kassios | ½–½ | Mitsis | Round 3: Kassios, Dimitrios - Mitsis, Georgios | Caro-Kann Defense: Two Knights Attack | |
| Jun 15, 2025 | Mitsis | 1–0 | Panopoulos | Round 2: Mitsis, Georgios - Panopoulos, Ioannis | Semi-Slav Defense: Stoltz Variation | |
| Jun 14, 2025 | Seferis | 0–1 | Mitsis | Round 1: Seferis, Georgios - Mitsis, Georgios | Yusupov-Rubinstein System | |
| Jun 14, 2025 | Mitsis | ½–½ | Kazantzoglou | Round 8: Mitsis, Georgios - Kazantzoglou, Stefanos | Italian Game: Two Knights Defense, Modern Bishop's Opening | |
| Apr 12, 2025 | Mitsis | 0–1 | Czernek | Piraeus GM Norm Tournament 'BOGDANOS MEMORIAL' | Sicilian Defense: Najdorf Variation | |
| Mar 26, 2025 | Mitsis | 0–1 | Zoler | Round 11: Mitsis, Georgios - Zoler, Dan | Indian Defense: Anti-Nimzo-Indian | |
| Mar 25, 2025 | Mitsis | ½–½ | Stoyanov | Round 10: Mitsis, Georgios - Stoyanov, Tsvetan | Queen's Gambit Accepted: Classical Defense, Main Line | |
| Mar 24, 2025 | Iskandarov | ½–½ | Mitsis | Round 9: Iskandarov, Misratdin - Mitsis, Georgios | Ruy Lopez: Morphy Defense, Tarrasch Variation | |
| Mar 20, 2025 | Mitsis | 0–1 | Pantsulaia | Round 6: Mitsis, Georgios - Pantsulaia, Levan | Queen's Gambit Accepted: Winawer Defense | |
| Mar 19, 2025 | Samadov | ½–½ | Mitsis | Round 5: Samadov, Read - Mitsis, Georgios | Queen's Gambit Declined: Ragozin Defense | |
| Mar 18, 2025 | Mitsis | 0–1 | Sonis | Round 4: Mitsis, Georgios - Sonis, Francesco | Queen's Indian Defense: Kasparov-Petrosian Variation, Petrosian Attack | |
| Mar 17, 2025 | Kantor | ½–½ | Mitsis | Round 3: Kantor, Gergely - Mitsis, Georgios | Italian Game: Two Knights Defense, Modern Bishop's Opening | |
| Mar 16, 2025 | Mitsis | 1–0 | Kobo | Round 2: Mitsis, Georgios - Kobo, Ori | Queen's Indian Defense: Petrosian Variation, Farago Defense | |
| Jul 10, 2024 | Sandalakis | 1–0 | Mitsis | Greek League 2024 | Sicilian Defense: Lasker-Pelikan Variation, Sveshnikov Variation, Chelyabinsk Variation | |
| Jul 9, 2024 | Mitsis | 1–0 | Frendzas | Greek League 2024 | Queen's Pawn Game: Symmetrical Variation | |
| Jul 8, 2024 | Nikolaidis | ½–½ | Mitsis | Greek League 2024 | Queen's Gambit Declined: Three Knights, Vienna Variation | |
| Jul 7, 2024 | Mitsis | ½–½ | Mastrovasilis | Greek League 2024 | Semi-Slav Defense: Meran Variation, Lundin Variation | |
| Jul 6, 2024 | Sandalakis | 0–1 | Mitsis | Greek League 2024 | Sicilian Defense: Nyezhmetdinov-Rossolimo Attack, Fianchetto Variation | |
| Jul 5, 2024 | Mitsis | 1–0 | Papasimakopoulos | Greek League 2024 | Slav Defense: Modern Line | |
| Jul 4, 2024 | Liodakis | 0–1 | Mitsis | Greek League 2024 | King's Gambit Accepted: Abbazia Defense | |
| Dec 10, 2024 | Hadzimanolis | ½–½ | Mitsis | Round 9: Hadzimanolis, Antonios - Mitsis, Georgios | Queen's Gambit Declined: Ragozin Defense, Alekhine Variation | |
| Dec 9, 2024 | Mitsis | 1–0 | Kolytas | Round 8: Mitsis, Georgios - Kolytas, Spiridon | Bogo-Indian Defense: Wade-Smyslov Variation | |
| Dec 8, 2024 | Alexiadis | ½–½ | Mitsis | Round 7: Alexiadis, Hristos - Mitsis, Georgios | Catalan Opening: Open Defense | |
| Dec 7, 2024 | Mitsis | 1–0 | Tsaknakis | Round 6: Mitsis, Georgios - Tsaknakis, Zisis | King's Indian Defense: Kazakh Variation | |
| Dec 6, 2024 | Alexakis | ½–½ | Mitsis | Round 5: Alexakis, Dimitris - Mitsis, Georgios | Vienna Game: Mieses Variation | |
| Dec 5, 2024 | Mitsis | 0–1 | Kourkoulos-Arditis | Round 4: Mitsis, Georgios - Kourkoulos-Arditis, Stamatis | King's Indian Defense: Orthodox Variation, Gligoric-Taimanov System | |
| Dec 4, 2024 | Mitsis | 1–0 | Patrelakis | Round 3: Mitsis, Georgios - Patrelakis, Evaggelos | Queen's Indian Defense: Kasparov-Petrosian Variation, Petrosian Attack | |
| Dec 3, 2024 | Stamatiou | 1–0 | Mitsis | Round 2: Stamatiou, Rodolfos - Mitsis, Georgios | Catalan Opening: Open Defense | |
| Dec 2, 2024 | Mitsis | ½–½ | Kalogridis | Round 1: Mitsis, Georgios - Kalogridis, Antonios | Grünfeld Defense: Three Knights Variation | |
| Mar 13, 2023 | Goryachkina | ½–½ | Mitsis | European Individual Chess Championship 2023 | Indian Defense: Anti-Nimzo-Indian | |
| Mar 12, 2023 | Mitsis | 1–0 | Remolar Gallen | European Championship | ? | |
| Mar 11, 2023 | Lobanov | 1–0 | Mitsis | European Individual Chess Championship 2023 | Nimzo-Indian Defense: St. Petersburg Variation, American Variation | |
| Mar 8, 2023 | Mitsis | 0–1 | Kacharava | European Individual Chess Championship 2023 | Slav Defense: Quiet Variation | |
| Mar 7, 2023 | Muradli | ½–½ | Mitsis | European Individual Chess Championship 2023 | Catalan Opening: Closed | |
| Mar 5, 2023 | Dragnev | 1–0 | Mitsis | European Individual Chess Championship 2023 | Ruy Lopez: Morphy Defense | |
| Mar 4, 2023 | Mitsis | ½–½ | Nesterov | European Championship | Catalan Opening: Open Defense, Modern Sharp Variation | |
| Dec 11, 2022 | Markidis | ½–½ | Mitsis | 71st Greek Championship 2022 | Ruy Lopez: Closed, Flohr System | |
| Dec 10, 2022 | Mitsis | ½–½ | Alexiadis | 71st Greek Championship 2022 | Catalan Opening: Open Defense, Classical Line | |
| Dec 9, 2022 | Koutlas | 0–1 | Mitsis | 71st Greek Championship 2022 | Italian Game: Two Knights Defense, Modern Bishop's Opening | |
| Dec 8, 2022 | Mitsis | ½–½ | Alexakis | 71st Greek Championship 2022 | Indian Defense: Pseudo-Benko | |
| Dec 7, 2022 | Marinakis | 0–1 | Mitsis | 71st Greek Championship 2022 | Ruy Lopez: Closed, Breyer Defense, Zaitsev Hybrid | |
| Dec 6, 2022 | Mitsis | ½–½ | Trimitzios | 71st Greek Championship 2022 | Slav Defense: Quiet Variation | |
| Dec 5, 2022 | Mitsis | 1–0 | Skembris | 71st Greek Championship 2022 | Slav Defense: Quiet Variation | |
| Dec 4, 2022 | Naoum | 0–1 | Mitsis | 71st Greek Championship 2022 | Nimzo-Indian Defense: Romanishin Variation | |
| Dec 3, 2022 | Mitsis | 1–0 | Moutousis | 71st Greek Championship 2022 | Benoni Defense: Semi-Benoni | |
| Aug 17, 2022 | Malikentzos | 1–0 | Mitsis | National Greek Team Championship | English Opening: Symmetrical Variation | |
| Aug 16, 2022 | Mitsis | 1–0 | Papadopoulos | National Greek Team Championship | Queen's Indian Defense: Kasparov-Petrosian Variation, Main Line | |
| Aug 15, 2022 | Tsakiris | 0–1 | Mitsis | National Greek Team Championship | Queen's Gambit Declined: Harrwitz Attack, Fianchetto Defense | |
| Aug 14, 2022 | Mitsis | ½–½ | Georgakopoulos | National Greek Team Championship | King's Indian Defense: Orthodox Variation, Gligoric-Taimanov System | |
| Aug 13, 2022 | Mitsis | 1–0 | Kapnisis | National Greek Team Championship | King's Indian Defense: Orthodox Variation, Gligoric-Taimanov System | |
| Aug 13, 2022 | Leftheriotis | 0–1 | Mitsis | National Greek Team Championship | Italian Game: Two Knights Defense, Modern Bishop's Opening | |
| Jul 23, 2022 | Szente Varga | * | Mitsis | 15th Paleochora Open | ? | |
| Jul 22, 2022 | Mitsis | * | Demchenko | 15th Paleochora Open | ? | |
| Jul 21, 2022 | Kelires | 1–0 | Mitsis | 15th Paleochora Open | English Opening: Agincourt Defense, Neo-Catalan Declined | |
| Jul 20, 2022 | Mitsis | ½–½ | David | 15th Paleochora Open | Catalan Opening: Open Defense | |
| Jul 19, 2022 | Mitsis | ½–½ | Yankelevich | 15th Paleochora Open | King's Indian Defense: Makogonov Variation | |
| Jul 18, 2022 | Mitsis | 1–0 | Berketis | 15th Paleochora Open | ? | |
| Jul 17, 2022 | Wiener | 0–1 | Mitsis | 15th Paleochora Open | ? | |
| Dec 12, 2021 | Mitsis | 0–1 | Kourkoulos-Arditis | 70th Greek Championship 2021 | Benoni Defense: Modern Variation | |
| Dec 11, 2021 | Kotronias | * | Mitsis | 70th Greek Championship 2021 | ? | |
| Dec 10, 2021 | Kanakaris | 0–1 | Mitsis | 70th Greek Championship 2021 | Zukertort Opening | |
| Dec 9, 2021 | Mitsis | 0–1 | Trimitzios | 70th Greek Championship 2021 | Dutch Defense | |
| Dec 8, 2021 | Ioannidis | ½–½ | Mitsis | 70th Greek Championship 2021 | Ruy Lopez: Morphy Defense | |
| Dec 7, 2021 | Mitsis | ½–½ | Nikolaidis | 70th Greek Championship 2021 | Slav Defense: Quiet Variation, Pin Defense | |
| Dec 6, 2021 | Mastrovasilis | 1–0 | Mitsis | 70th Greek Championship 2021 | Nimzo-Indian Defense | |
| Dec 5, 2021 | Mitsis | 1–0 | Kapnisis | 70th Greek Championship 2021 | Queen's Pawn Game: Symmetrical Variation | |
| Dec 4, 2021 | Alexakis | ½–½ | Mitsis | 70th Greek Championship 2021 | Ruy Lopez: Morphy Defense, Bayreuth Variation | |
| Sep 9, 2021 | Mitsis | 0–1 | Arfan48 | Online_Olympiad_Div1_PoolA | Slav Defense: Quiet Variation, Schallopp Defense | |
| Sep 9, 2021 | qsjtgx | 1–0 | Mitsis | Online_Olympiad_Div1_PoolA | Queen's Gambit Declined: Cambridge Springs Defense, Bogoljubow Variation | |
| Sep 9, 2021 | Nogerbek | 1–0 | Mitsis | Online_Olympiad_Div1_PoolA | Catalan Opening: Closed | |
| Jun 2, 2021 | Mitsis | 1–0 | Krallis | Greek Qualification Hybrid | King's Indian Attack | |
| Jun 2, 2021 | Mitsis | ½–½ | Theodorou | Greek Qualification Hybrid | King's Indian Defense: Orthodox Variation, Gligoric-Taimanov System | |
| Jun 2, 2021 | Mitsis | ½–½ | Evgenios [Ioannidis] | Greek Qualification Hybrid | Catalan Opening: Closed | |
| Jun 2, 2021 | Mastrovasilis | ½–½ | Mitsis | Greek Qualification Hybrid | Ruy Lopez: Morphy Defense, Tarrasch Variation | |
| Jun 2, 2021 | Halkias | ½–½ | Mitsis | Greek Qualification Hybrid | Queen's Gambit Declined: Three Knights Variation | |
| Jun 2, 2021 | Stamatis | ½–½ | Mitsis | Greek Qualification Hybrid | English Opening: Agincourt Defense, Neo-Catalan Declined | |
| — | Mitsis | 1–0 | Koudounis | National Greek Team Championship | Slav Defense: Quiet Variation | |
| — | Mitsis | ½–½ | Patrelakis | Piraeus GM Norm Tournament 'BOGDANOS MEMORIAL' | Bogo-Indian Defense: Vitolins Variation | |
| — | Mitsis | ½–½ | Lazov | Piraeus GM Norm Tournament 'BOGDANOS MEMORIAL' | King's Indian Defense: Orthodox Variation, Gligoric-Taimanov System | |
| — | Nikolaidis | ½–½ | Mitsis | Piraeus GM Norm Tournament 'BOGDANOS MEMORIAL' | Nimzo-Indian Defense: Normal Variation, Gligoric System, Exchange Variation | |
| — | Risteski | 1–0 | Mitsis | Piraeus GM Norm Tournament 'BOGDANOS MEMORIAL' | Italian Game: Two Knights Defense, Modern Bishop's Opening | |
| — | Dobrovoljc | 0–1 | Mitsis | Piraeus GM Norm Tournament 'BOGDANOS MEMORIAL' | Ruy Lopez: Morphy Defense, Tarrasch Variation | |
| — | Kapnisis | 1–0 | Mitsis | Piraeus GM Norm Tournament 'BOGDANOS MEMORIAL' | Italian Game: Two Knights Defense, Modern Bishop's Opening | |
| — | Krallis | 1–0 | Mitsis | Piraeus GM Norm Tournament 'BOGDANOS MEMORIAL' | Italian Game: Two Knights Defense, Modern Bishop's Opening | |