| Jun 14, 2026 | Bora | 1–0 | Preotu | Round 5: Bora, Safal - Preotu, Razvan | Queen's Gambit Declined: Chigorin Defense, Main Line | |
| Jun 14, 2026 | Preotu | 0–1 | Panchanathan | Round 4: Preotu, Razvan - Panchanathan, Magesh Chandran | Italian Game: Paris Defense | |
| Jun 13, 2026 | Zhu | 0–1 | Preotu | Round 3: Zhu, Linxi - Preotu, Razvan | Caro-Kann Defense: Advance Variation, Botvinnik-Carls Defense | |
| Jun 13, 2026 | Preotu | 1–0 | Wang | Round 2: Preotu, Razvan - Wang, Aaron | Caro-Kann Defense: Advance Variation, Botvinnik-Carls Defense | |
| Jun 12, 2026 | Chen | 0–1 | Preotu | Round 1: Chen, Alan - Preotu, Razvan | Philidor Defense: Lion Variation | |
| May 18, 2026 | Preotu | 0–1 | Razin | 2026 Ontario Open Crown | French Defense: Steinitz Variation, Boleslavsky Variation | |
| May 18, 2026 | Preotu | ½–½ | Chiku-Ratte | 2026 Ontario Open Crown | English Opening: Anglo-Indian Defense, King's Knight Variation | |
| May 17, 2026 | Preotu | ½–½ | Noritsyn | 2026 Ontario Open Crown | Scotch Game: Potter Variation | |
| May 16, 2026 | Preotu | 1–0 | Kot | 2026 Ontario Open Crown | Zukertort Opening | |
| May 15, 2026 | Keleberda | ½–½ | Preotu | 2026 Ontario Open Crown | Caro-Kann Defense: Exchange Variation | |
| May 15, 2026 | Sambuev | 0–1 | Preotu | 2026 Ontario Open Crown | Sicilian Defense: Sozin Attack, Flank Variation | |
| May 15, 2026 | Kola | 0–1 | Preotu | 2026 Ontario Open Crown | Queen's Gambit Declined: Chigorin Defense, Main Line | |
| Mar 22, 2026 | Preotu | ½–½ | Padhya Saumil | Round 9: Preotu, Razvan - Padhya Saumil | Sicilian Defense: Najdorf Variation, English Attack | |
| Mar 22, 2026 | Melillo | 1–0 | Preotu | Round 8: Melillo, Lucius - Preotu, Razvan | Sicilian Defense: Modern Variations | |
| Mar 21, 2026 | Preotu | 1–0 | Lu | Round 7: Preotu, Razvan - Lu, Maximillian | Sicilian Defense: Najdorf Variation, Freak Attack | |
| Mar 21, 2026 | Matviishen | 1–0 | Preotu | Round 6: Matviishen, Viktor - Preotu, Razvan | Nimzo-Indian Defense: St. Petersburg Variation, Fischer Variation | |
| Mar 20, 2026 | Preotu | ½–½ | Zhu | Round 5: Preotu, Razvan - Zhu, Linxi | King's Indian Attack: Pachman System | |
| Mar 19, 2026 | Jing | ½–½ | Preotu | Round 3: Jing, Andrew - Preotu, Razvan | Torre Attack: Fianchetto Defense | |
| Mar 19, 2026 | Preotu | 1–0 | Guo | Round 2: Preotu, Razvan - Guo, Ethan | English Opening: Symmetrical Variation, Botvinnik System Reversed, with Nf3 | |
| Mar 18, 2026 | Delgado Ramirez | 1–0 | Preotu | Round 1: Delgado Ramirez, Neuris - Preotu, Razvan | Sicilian Defense: Moscow Variation | |
| Mar 15, 2026 | Atwell | ½–½ | Preotu | Round 4: Atwell, Rose - Preotu, Razvan | Philidor Defense: Lion Variation | |
| Jan 19, 2026 | Preotu | 1–0 | Uz | Round 6: Preotu, Razvan - Uz, Kagan | Sicilian Defense: Moscow Variation | |
| Jan 18, 2026 | Jiang | 0–1 | Preotu | Round 3: Jiang, Andrew - Preotu, Razvan | Zukertort Opening: Sicilian Invitation | |
| Jan 16, 2026 | Liang | 1–0 | Preotu | Round 5: Liang, Awonder - Preotu, Razvan | Caro-Kann Defense: Advance Variation, Botvinnik-Carls Defense | |
| Jan 16, 2026 | Preotu | 1–0 | Kung | Round 4: Preotu, Razvan - Kung, Thomas | King's Indian Attack, with e6 | |
| Jan 16, 2026 | Preotu | 1–0 | Gadi | Round 2: Preotu, Razvan - Gadi, Varun | Sicilian Defense: Najdorf Variation | |
| Jan 16, 2026 | Gurumoorthi | 0–1 | Preotu | Round 1: Gurumoorthi, Gurugrahan - Preotu, Razvan | Sicilian Defense: Dragon Variation, Classical Variation | |
| Nov 30, 2025 | Preotu | 0–1 | Bok | Round 9: Preotu, Razvan - Bok, Benjamin | Italian Game: Classical Variation, Giuoco Pianissimo | |
| Nov 30, 2025 | Sonis | 1–0 | Preotu | Round 8: Sonis, Francesco - Preotu, Razvan | Sicilian Defense: Moscow Variation, Main Line | |
| Nov 30, 2025 | Preotu | 1–0 | Brodsky | Round 7: Preotu, Razvan - Brodsky, David | Neo-Grünfeld Defense: Classical Variation, Original Defense | |
| Nov 29, 2025 | Rakhmatullaev | 0–1 | Preotu | Round 6: Rakhmatullaev, Almas - Preotu, Razvan | French Defense: Classical Variation | |
| Nov 28, 2025 | Preotu | 1–0 | Li | Round 5: Preotu, Razvan - Li, Rachael | Caro-Kann Defense: Endgame Offer | |
| Nov 28, 2025 | Xiong | 1–0 | Preotu | Round 4: Xiong, Jeffery - Preotu, Razvan | Scandinavian Defense: Gubinsky-Melts Defense | |
| Nov 27, 2025 | Preotu | 1–0 | Mohammad Fahad | Round 3: Preotu, Razvan - Mohammad Fahad, Rahman | Zukertort Opening: Reversed Grünfeld | |
| Nov 27, 2025 | Caglar | 0–1 | Preotu | Round 2: Caglar, Sila - Preotu, Razvan | Sicilian Defense: Moscow Variation | |
| Nov 26, 2025 | Preotu | 1–0 | Brady | Round 1: Preotu, Razvan - Brady, Tyson | Sicilian Defense: Nyezhmetdinov-Rossolimo Attack | |
| Sep 1, 2025 | Gadi | 0–1 | Preotu | Round 5: Gadi, Varun - Preotu, Razvan | Sicilian Defense: Najdorf Variation, English Attack | |
| Jul 6, 2025 | Preotu | ½–½ | Zhou | Round 9: Preotu, Razvan - Zhou, Jianchao | Sicilian Defense: Moscow Variation, Main Line | |
| Jul 6, 2025 | Preotu | ½–½ | Xiong | Round 8: Preotu, Razvan - Xiong, Jeffery | English Opening: Neo-Catalan | |
| Jul 5, 2025 | Cardoso Cardoso | 0–1 | Preotu | Round 7: Cardoso Cardoso, Jose Gabriel - Preotu, Razvan | Slav Defense: Quiet Variation, Schallopp Defense | |
| Jul 5, 2025 | Preotu | * | Katz | 53rd Annual World Open Chess Tournament | English Opening: Anglo-Indian Defense, King's Knight Variation | |
| Jul 5, 2025 | Kevlishvili | ½–½ | Preotu | Round 5: Kevlishvili, Robby - Preotu, Razvan | French Defense: Tarrasch Variation, Open System, Euwe-Keres Line | |
| Jul 4, 2025 | Preotu | 1–0 | Pierrot | 53rd Annual World Open Chess Tournament | Sicilian Defense: Four Knights Variation, Exchange Variation | |
| Jul 3, 2025 | Vanapalli | * | Preotu | 53rd Annual World Open Chess Tournament | ? | |
| Apr 22, 2025 | Noritsyn | * | Preotu | Round 9: Noritsyn, Nikolay - Preotu, Razvan | Sicilian Defense: Najdorf Variation, English Attack | |
| Apr 21, 2025 | Preotu | 1–0 | Ng | Round 7: Preotu, Razvan - Ng, Gary | Caro-Kann Defense: Advance Variation, Botvinnik-Carls Defense | |
| Apr 21, 2025 | Sambuev | 0–1 | Preotu | Round 8: Sambuev, Bator - Preotu, Razvan | Zukertort Opening: Sicilian Invitation | |
| Apr 20, 2025 | Preotu | ½–½ | Plotkin | Round 6: Preotu, Razvan - Plotkin, Mark | English Opening: Anglo-Indian Defense, King's Knight Variation | |
| Apr 19, 2025 | Moses | 0–1 | Preotu | Round 5: Moses, Neil - Preotu, Razvan | English Opening: Symmetrical Variation | |
| Mar 30, 2025 | Preotu | 1–0 | Chasin | Round 5: Preotu, Razvan - Chasin, Nico | King's Indian Attack: Keres Variation | |
| Mar 29, 2025 | Wu | ½–½ | Preotu | Round 2: Wu, Andrew - Preotu, Razvan | Caro-Kann Defense: Tartakower Variation | |
| Mar 28, 2025 | Preotu | 1–0 | Tyrrell | Round 1: Preotu, Razvan - Tyrrell, Benjamin | Sicilian Defense: Dragon Variation, Yugoslav Attack, Modern Line | |
| Apr 19, 2025 | Preotu | 0–1 | Keleberda | Canadian Closed 2025 | French Defense: Steinitz Variation, Boleslavsky Variation | |
| Apr 18, 2025 | Preotu | ½–½ | Song | Canadian Closed 2025 | English Opening: Anglo-Indian Defense, King's Knight Variation | |
| Apr 18, 2025 | Wang | 0–1 | Preotu | Canadian Closed 2025 | Grünfeld Defense: Russian Variation, Accelerated Variation | |
| Apr 17, 2025 | Zhong | 0–1 | Preotu | Canadian Closed 2025 | French Defense: Tarrasch Variation, Chistyakov Defense | |
| Dec 30, 2024 | Doknjas | 1–0 | Preotu | 15th Annual Calgary International | Caro-Kann Defense: Tartakower Variation | |
| Dec 29, 2024 | Preotu | 0–1 | Bahmani | 15th Annual Calgary International | Italian Game: Giuoco Pianissimo, Normal | |
| Dec 29, 2024 | Preotu | 1–0 | Komarov | 15th Annual Calgary International | English Opening: Symmetrical Variation, Botvinnik System Reversed, with Nf3 | |
| Dec 28, 2024 | Georgiev | 0–1 | Preotu | 15th Annual Calgary International | East Indian Defense | |
| Dec 28, 2024 | Chandra | 0–1 | Preotu | 15th Annual Calgary International | Caro-Kann Defense: Endgame Offer | |
| Dec 27, 2024 | Preotu | 1–0 | Keleberda | 15th Annual Calgary International | French Defense: Steinitz Variation | |
| Dec 27, 2024 | Doknjas | 0–1 | Preotu | 15th Annual Calgary International | Sicilian Defense: Najdorf Variation, English Attack | |
| Dec 26, 2024 | Preotu | 1–0 | Arruebarrena Rodriguez | 15th Annual Calgary International | Sicilian Defense: Delayed Alapin Variation, with e6 | |
| Dec 26, 2024 | Darvekar | 0–1 | Preotu | 15th Annual Calgary International | French Defense: Advance Variation, Lputian Variation | |
| Sep 22, 2024 | Banh Gia Huy | ½–½ | Preotu | 45th FIDE Chess Olympiad | Queen's Pawn Game: London System | |
| Sep 21, 2024 | Preotu | 1–0 | Jaramillo Lopez | 45th FIDE Chess Olympiad | English Opening: Anglo-Indian Defense, Anglo-Grünfeld Variation | |
| Sep 19, 2024 | Renjith | ½–½ | Preotu | 45th FIDE Chess Olympiad | Caro-Kann Defense: Panov Attack, Modern Defense | |
| Sep 18, 2024 | Sebenik | ½–½ | Preotu | 45th FIDE Chess Olympiad | English Opening: Symmetrical Variation | |
| Sep 16, 2024 | Preotu | 1–0 | Erdogmus | 45th FIDE Chess Olympiad | King's Indian Attack | |
| Sep 14, 2024 | Preotu | ½–½ | Papaioannou | 45th FIDE Chess Olympiad | King's Indian Attack | |
| Sep 13, 2024 | Preotu | 1–0 | Krejci | 45th FIDE Chess Olympiad | King's Indian Attack | |
| Sep 12, 2024 | Preotu | 1–0 | Amar | 45th FIDE Chess Olympiad | Sicilian Defense: Najdorf Variation, Opocensky Variation, Traditional Line | |
| Sep 11, 2024 | Preotu | 1–0 | Brookfield | 45th FIDE Chess Olympiad | Sicilian Defense: Dragon Variation, Yugoslav Attack, Modern Line | |
| Jun 1, 2024 | Preotu | 0–1 | Atanasov | Round 4: Preotu, Razvan - Atanasov, Anthony | King's Indian Attack: Sicilian Variation | |
| Jun 1, 2024 | Sai Krishna G V | ½–½ | Preotu | Round 3: Sai Krishna G V - Preotu, Razvan | French Defense: Classical Variation, Burn Variation, Morozevich Line | |
| Jun 1, 2024 | Derraugh | 0–1 | Preotu | Round 2: Derraugh, Geordie - Preotu, Razvan | Grünfeld Defense: Brinckmann Attack | |
| May 31, 2024 | Preotu | 1–0 | Marchand | Round 1: Preotu, Razvan - Marchand, Calix | Sicilian Defense: Delayed Alapin Variation | |
| May 20, 2024 | Preotu | 0–1 | Razin | Round 6: Preotu, Razvan - Razin, Vadim | French Defense: Steinitz Variation, Boleslavsky Variation | |
| May 20, 2024 | Gao | 0–1 | Preotu | Round 5: Gao, Heye - Preotu, Razvan | Sicilian Defense: Scheveningen Variation, English Attack, with f3 | |
| May 19, 2024 | Preotu | 0–1 | Sambuev | Round 4: Preotu, Razvan - Sambuev, Bator | English Opening: King's English Variation, Closed System, Full Symmetry | |
| May 19, 2024 | Stevens | ½–½ | Preotu | Round 3: Stevens, Christian - Preotu, Razvan | Sicilian Defense: Prins Variation | |
| May 18, 2024 | Preotu | 1–0 | Kapra | Round 2: Preotu, Razvan - Kapra, Jerjis | King's Indian Attack | |
| May 18, 2024 | Ahmed | 0–1 | Preotu | Round 1: Ahmed, Syed Ibrahim - Preotu, Razvan | King's Indian Defense: Normal Variation, King's Knight Variation | |
| Apr 2, 2024 | Atanasov | ½–½ | Preotu | 2024 Zonals | Slav Defense: Quiet Variation, Schallopp Defense | |
| Apr 1, 2024 | Preotu | 1–0 | Noritsyn | 2024 Zonals | Sicilian Defense: Najdorf Variation | |
| Apr 1, 2024 | Stevens | 0–1 | Preotu | 2024 Zonals | Queen's Pawn Game: Barry Attack, Grünfeld Variation | |
| Mar 31, 2024 | Preotu | 1–0 | Xu | 2024 Zonals | King's Indian Defense: Makogonov Variation | |
| Mar 30, 2024 | Preotu | 0–1 | Vettese | Round 6: Preotu, Razvan - Vettese, Nicholas | Italian Game: Classical Variation, Giuoco Pianissimo | |
| Mar 30, 2024 | Terry | 0–1 | Preotu | Round 5: Terry, Joshua - Preotu, Razvan | Queen's Gambit Declined: Chigorin Defense, Main Line | |
| Mar 30, 2024 | Preotu | 1–0 | Kaufman | Round 4: Preotu, Razvan vs Kaufman, Raymond | King's Indian Attack | |
| Mar 29, 2024 | Doknjas | ½–½ | Preotu | 2024 Canadian Championship at Hart House, Toronto | Sicilian Defense: Najdorf Variation, Adams Attack | |
| Mar 28, 2024 | Jaferian | 1–0 | Preotu | 2024 Canadian Championship at Hart House, Toronto | Sicilian Defense: Alapin Variation | |
| Mar 27, 2024 | Preotu | 1–0 | Abrahams | Round 1: Preotu, Razvan - Abrahams, Daniel | Sicilian Defense: Delayed Alapin Variation | |
| Mar 17, 2024 | Sambuev | 0–1 | Preotu | Round 5: Sambuev, Bator - Preotu, Razvan | Slav Defense: Quiet Variation, Schallopp Defense | |
| Mar 17, 2024 | Qian | 0–1 | Preotu | Round 4: Qian, Ashley - Preotu, Razvan | ? | |
| Mar 16, 2024 | Preotu | 0–1 | Shawn Rodrigue-Lemieux | Round 3: Preotu, Razvan - Shawn Rodrigue-Lemieux | English Opening: Agincourt Defense, Neo-Catalan Declined | |
| Mar 16, 2024 | Preotu | 1–0 | Zhao | Round 2: Preotu, Razvan - Zhao, Jifan | French Defense: Steinitz Variation, Boleslavsky Variation | |
| Mar 15, 2024 | Singh Dhaliwal | 0–1 | Preotu | Round 1: Singh Dhaliwal, Jaipreet - Preotu, Razvan | Sicilian Defense: Najdorf Variation, English Attack | |
| Dec 28, 2024 | Chandra | 0–1 | Preotu | Round 4: Chandra, Anand Rishi - Preotu, Razvan | Caro-Kann Defense: Endgame Offer | |