| Jul 1, 2023 | Niemann | 1–0 | Matta | 51st Annual World Open | Petrov's Defense: Classical Attack, Staunton Variation | |
| Oct 19, 2022 | Niemann | ½–½ | Liang | U.S. Chess Championship | French Defense: Chigorin Variation | |
| Oct 18, 2022 | Sevian | 0–1 | Niemann | U.S. Chess Championship | Queen's Gambit Declined: Semi-Tarrasch Defense | |
| Oct 17, 2022 | Niemann | 1–0 | Lenderman | U.S. Chess Championship | Slav Defense: Quiet Variation, Pin Defense | |
| Oct 15, 2022 | Moradiabadi | 0–1 | Niemann | U.S. Chess Championship | King's Indian Defense: Normal Variation, King's Knight Variation | |
| Oct 14, 2022 | Niemann | ½–½ | So | U.S. Chess Championship | Italian Game: Classical Variation, Giuoco Pianissimo | |
| Oct 13, 2022 | Aronian | ½–½ | Niemann | U.S. Chess Championship | Italian Game: Two Knights Defense, Polerio Defense, Bishop Check Line | |
| Oct 12, 2022 | Swiercz | 1–0 | Niemann | U.S. Chess Championship | Bogo-Indian Defense: Retreat Variation | |
| Oct 11, 2022 | Niemann | 0–1 | Robson | U.S. Chess Championship | Indian Defense: Normal Variation | |
| Oct 9, 2022 | Dominguez | ½–½ | Niemann | U.S. Chess Championship | Ruy Lopez: Berlin Defense, l'Hermet Variation, Berlin Wall Defense | |
| Oct 8, 2022 | Niemann | 0–1 | Caruana | U.S. Chess Championship | Nimzo-Indian Defense: Classical Variation | |
| Oct 7, 2022 | Shankland | ½–½ | Niemann | U.S. Chess Championship | Nimzo-Indian Defense: Classical Variation | |
| Oct 6, 2022 | Niemann | ½–½ | Xiong | U.S. Chess Championship | French Defense: Steinitz Variation, Boleslavsky Variation | |
| Oct 5, 2022 | Yoo | 0–1 | Niemann | U.S. Chess Championship | Rapport-Jobava System | |
| Sep 11, 2022 | Nepomniachtchi | ½–½ | Niemann | Sinquefield Cup | English Opening: King's English Variation, Kramnik-Shirov Counterattack | |
| Sep 10, 2022 | Niemann | 0–1 | Caruana | Sinquefield Cup | English Opening: King's English Variation, Kramnik-Shirov Counterattack | |
| Sep 9, 2022 | Vachier-Lagrave | ½–½ | Niemann | Sinquefield Cup | King's Indian Attack | |
| Sep 8, 2022 | Niemann | 0–1 | So | Sinquefield Cup | Petrov's Defense: Classical Attack | |
| Sep 6, 2022 | Dominguez | ½–½ | Niemann | Sinquefield Cup | Italian Game: Classical Variation, Giuoco Pianissimo | |
| Sep 5, 2022 | Niemann | ½–½ | Firouzja | Sinquefield Cup | Italian Game: Classical Variation, Giuoco Pianissimo | |
| Sep 4, 2022 | - | -/- | Niemann | Round 3: Magnus Carlsen - Hans Niemann | Nimzo-Indian Defense: Romanishin Variation | |
| Sep 3, 2022 | Niemann | 1–0 | Mamedyarov | Round 2: Hans Niemann - Shakhriyar Mamedyarov | English Opening: Four Knights System, Nimzowitsch Variation | |
| Sep 2, 2022 | Niemann | ½–½ | Aronian | Round 1: Hans Niemann - Levon Aronian | Ruy Lopez: Berlin Defense, Rio Gambit Accepted | |
| May 9, 2022 | Van Foreest | ½–½ | Niemann | Tepe Sigeman & Co Chess Tournament | Italian Game: Classical Variation, Giuoco Pianissimo | |
| May 8, 2022 | Niemann | ½–½ | Grandelius | Tepe Sigeman & Co Chess Tournament | Neo-Grünfeld Defense: Ultra-Delayed Exchange Variation | |
| May 7, 2022 | Niemann | 1–0 | Shirov | Tepe Sigeman & Co Chess Tournament | Slav Defense: Quiet Variation, Schallopp Defense | |
| May 6, 2022 | Salem | 0–1 | Niemann | Tepe Sigeman & Co Chess Tournament | Nimzo-Indian Defense: Normal Variation, Gligoric System, Exchange Variation | |
| May 5, 2022 | Niemann | 1–0 | Erigaisi | Tepe Sigeman & Co Chess Tournament | Slav Defense: Quiet Variation, Schallopp Defense | |
| May 4, 2022 | Navara | ½–½ | Niemann | Tepe Sigeman & Co Chess Tournament | Italian Game: Classical Variation, Giuoco Pianissimo | |
| May 3, 2022 | Niemann | ½–½ | Adams | Tepe Sigeman & Co Chess Tournament | Queen's Gambit Declined: Exchange Variation, Reshevsky Variation | |
| Mar 10, 2022 | Hakobyan | 1–0 | Niemann | 2022 Spring Chess Classic | Sicilian Defense: Moscow Variation | |
| Mar 9, 2022 | Niemann | 0–1 | Swiercz | 2022 Spring Chess Classic | Ruy Lopez: Closed | |
| Mar 8, 2022 | Antipov | 0–1 | Niemann | 2022 Spring Chess Classic | Italian Game: Classical Variation, Giuoco Pianissimo | |
| Mar 7, 2022 | Niemann | ½–½ | Xiong | 2022 Spring Chess Classic | Sicilian Defense: Moscow Variation | |
| Mar 6, 2022 | Dragun | * | Niemann | 2022 Spring Chess Classic | Four Knights Game: Scotch Variation Accepted | |
| Mar 4, 2022 | Niemann | ½–½ | Sevian | 2022 Spring Chess Classic | Ruy Lopez: Open, Howell Attack | |
| Mar 4, 2022 | Niemann | 1–0 | Lenderman | 2022 Spring Chess Classic | Catalan Opening: Closed | |
| Mar 3, 2022 | Nyzhnyk | ½–½ | Niemann | 2022 Spring Chess Classic | English Opening: Four Knights System, Nimzowitsch Variation | |
| Mar 2, 2022 | Niemann | ½–½ | Robson | 2022 Spring Chess Classic | English Opening: Four Knights System, Nimzowitsch Variation | |
| Aug 8, 2021 | Niemann | 1–0 | Liang | 2021 U.S. Open | Caro-Kann Defense: Advance Variation | |
| Aug 7, 2021 | Niemann | 1–0 | Rosenthal | 2021 U.S. Open | Queen's Gambit Declined | |
| Aug 6, 2021 | Niemann | 1–0 | Akobian | 2021 U.S. Open (4-day) | English Opening: Agincourt Defense, Catalan Defense Accepted | |
| Aug 6, 2021 | Hungaski | 0–1 | Niemann | 2021 U.S. Open (4-day) | Italian Game: Two Knights Defense, Polerio Defense, Bishop Check Line | |
| Aug 6, 2021 | Lenderman | 1–0 | Niemann | 2021 U.S. Open | Trompowsky Attack | |
| Aug 5, 2021 | Niemann | 1–0 | Levin | 2021 U.S. Open (4-day) | Queen's Gambit Declined: Harrwitz Attack, Main Line | |
| Aug 5, 2021 | Niemann | 1–0 | Gorman | 2021 U.S. Open (4-day) | English Opening: Neo-Catalan | |
| Aug 5, 2021 | Ravid | 0–1 | Niemann | 2021 U.S. Open (4-day) | English Opening: King's English Variation, Two Knights Variation | |
| Aug 5, 2021 | Dong | 0–1 | Niemann | 2021 U.S. Open (4-day) | Nimzo-Indian Defense: Classical Variation, Noa Variation | |
| Jul 5, 2021 | Niemann | ½–½ | Zhou | 49th Annual World Open | Dutch Defense: Raphael Variation | |
| Jul 5, 2021 | Nyzhnyk | * | Niemann | 49th Annual World Open | Ruy Lopez: Closed, Delayed Exchange | |
| Jul 5, 2021 | Burke | 0–1 | Niemann | 49th Annual World Open | Italian Game: Two Knights Defense, Modern Bishop's Opening | |
| Jul 4, 2021 | Niemann | 1–0 | Gledura | 49th Annual World Open | Neo-Grünfeld Defense: Goglidze Attack | |
| Jul 4, 2021 | Xiong | * | Niemann | 49th Annual World Open | Catalan Opening: Closed | |
