| Apr 6, 2026 | Harrison | ½–½ | Wilkins | Round 7: Harrison, Oliver - Wilkins, Zack | Italian Game: Scotch Gambit, Double Gambit Accepted | |
| Apr 6, 2026 | Murthy | 0–1 | Harrison | Round 6: Murthy, Arush - Harrison, Oliver | Dutch Defense: Queen's Knight Variation | |
| Apr 5, 2026 | Harrison | 0–1 | Burton | Round 5: Harrison, Oliver - Burton, Henry | French Defense: Tarrasch Variation, Closed Variation | |
| Apr 4, 2026 | Harrison | 0–1 | Tyrrell | Round 4: Harrison, Oliver - Tyrrell, Lachlan Baly Hughes | Modern Defense: Standard Defense | |
| Apr 4, 2026 | Thomas | 1–0 | Harrison | Round 3: Thomas, Roy - Harrison, Oliver | English Opening: King's English Variation, Two Knights Variation, Smyslov System | |
| Apr 3, 2026 | Harrison | 1–0 | Bourne | Round 2: Harrison, Oliver - Bourne, Patrick | Modern Defense: Standard Defense | |
| Apr 3, 2026 | Hollyman | 0–1 | Harrison | Round 1: Hollyman, Mike - Harrison, Oliver | English Opening: King's English Variation, Kramnik-Shirov Counterattack | |
| Mar 30, 2026 | Harrison | 0–1 | Shivakumar | Milton Keynes FIDE Chess Congress 2026 | ? | |
| Mar 29, 2026 | Hale | 1–0 | Harrison | Milton Keynes FIDE Chess Congress 2026 | Benoni Defense: Old Benoni | |
| Mar 1, 2026 | Okhai | 1–0 | Harrison | Round 5: Okhai, Shabir - Harrison, Oliver | Italian Game: Classical Variation, Giuoco Pianissimo, with a4 a5 | |
| Mar 1, 2026 | Harrison | ½–½ | Khoury | Round 4: Harrison, Oliver - Khoury, Theo | Sicilian Defense: Najdorf Variation, Freak Attack | |
| Feb 28, 2026 | Arnott | 0–1 | Harrison | Round 2: Arnott, Jonathan W - Harrison, Oliver | Italian Game: Scotch Gambit, Max Lange Attack | |
| Feb 28, 2026 | Harrison | 1–0 | Chua | Round 1: Harrison, Oliver - Chua, Chee Sian Sebastien | French Defense: Tarrasch Variation | |
| Feb 22, 2026 | Cordova-Lopez | 1–0 | Harrison | Round 7: Cordova-Lopez, Diego Anton - Harrison, Oliver | Four Knights Game: Gunsberg Variation | |
| Feb 21, 2026 | Choong | 1–0 | Harrison | Round 5: Choong, Han-sen - Harrison, Oliver | Vienna Game: Paulsen Variation | |
| Feb 21, 2026 | Harrison | 0–1 | Cebolla Ruiz | Round 4: Harrison, Oliver - Cebolla Ruiz, David | Philidor Defense: Exchange Variation | |
| Feb 21, 2026 | Kabir Singh Ahuja | 1–0 | Harrison | Round 3: Kabir Singh Ahuja - Harrison, Oliver | Benoni Defense: Old Benoni | |
| Feb 21, 2026 | Harrison | ½–½ | Pacetti Terra | Round 2: Harrison, Oliver - Pacetti Terra, Nicolas | Ruy Lopez: Exchange Variation, Keres Variation | |
| Feb 21, 2026 | Gonzalez Sastron | 1–0 | Harrison | Round 1: Gonzalez Sastron, David - Harrison, Oliver | Ruy Lopez: Open, Classical Defense | |
| Jan 4, 2026 | ONUOHA | 0–1 | Harrison | Round 5: ONUOHA, Obioma - Harrison, Oliver | Italian Game: Classical Variation, Giuoco Pianissimo | |
| Jan 4, 2026 | Harrison | ½–½ | Simms | Round 4: Harrison, Oliver - Simms, Jake | Modern Defense | |
| Jan 3, 2026 | Akeya-Price | ½–½ | Harrison | Round 3: Akeya-Price, Robert - Harrison, Oliver | Benoni Defense: Old Benoni | |
| Jan 3, 2026 | Harrison | 0–1 | Wheatley | Round 2: Harrison, Oliver - Wheatley, Wilfred | Scandinavian Defense: Valencian Variation | |
| Jan 2, 2026 | Hubbard | 0–1 | Harrison | Round 1: Hubbard, Michael - Harrison, Oliver | Neo-Grünfeld Defense: Classical Variation, Original Defense | |
| Feb 22, 2025 | Harrison | ½–½ | Saravanan | British Universities Chess Association Blitz 2025 | Sicilian Defense: Delayed Alapin Variation, with d6 | |
| Feb 22, 2025 | Harrison | 1–0 | Lodge | British Universities Chess Association Blitz 2025 | Caro-Kann Defense: Accelerated Panov Attack | |
| Feb 22, 2025 | Harrison | 1–0 | Smith | British Universities Chess Association Blitz 2025 | Sicilian Defense: Delayed Alapin Variation, with e6 | |
| Feb 22, 2025 | Jackson | 1–0 | Harrison | British Universities Chess Association Blitz 2025 | Ruy Lopez: Morphy Defense | |
| Feb 22, 2025 | Benzaira | 1–0 | Harrison | British Universities Chess Association Blitz 2025 | Ruy Lopez: Morphy Defense | |
| Feb 22, 2025 | Ishir Narayan | 1–0 | Harrison | British Universities Chess Association Blitz 2025 | Ruy Lopez: Morphy Defense | |
| Dec 15, 2024 | Harrison | 1–0 | Soszynski | Keith Escott Memorial Congress: U2000 | Nimzowitsch Defense: Williams Variation | |
| Dec 15, 2024 | Ali | 1–0 | Harrison | Keith Escott Memorial Congress: U2000 | East Indian Defense | |
| Dec 14, 2024 | Ou | 0–1 | Harrison | Keith Escott Memorial Congress: U2000 | Italian Game: Two Knights Defense, Polerio Defense, Bogoljubow Variation | |
| Dec 14, 2024 | De Block | 0–1 | Harrison | Keith Escott Memorial Congress: U2000 | Benoni Defense | |
| Feb 25, 2024 | Daniel Wilkins | 1–0 | Harrison | Round 8: Daniel Wilkins - Harrison, Oliver | Italian Game: Classical Variation, Giuoco Pianissimo, with d6 | |
| Feb 25, 2024 | Harrison | 0–1 | Carpenter-Friend | Round 7: Harrison, Oliver - Carpenter-Friend, Ben | Sicilian Defense: Old Sicilian | |
| Feb 25, 2024 | James Guest | 0–1 | Harrison | Round 9: James Guest - Harrison, Oliver | English Opening: Anglo-Indian Defense | |
| Feb 24, 2024 | Harrison | 0–1 | Ho | Round 8: Harrison, Oliver - Ho, Leyton | Caro-Kann Defense: Accelerated Panov Attack | |
| Feb 24, 2024 | Daniel Wilkins | 0–1 | Harrison | Round 7: Daniel Wilkins - Harrison, Oliver | Scandinavian Defense: Mieses-Kotroc Variation | |
| Feb 24, 2024 | Harrison | 0–1 | Kuhendiran | Round 6: Harrison, Oliver - Kuhendiran, Tharshan | Scandinavian Defense: Gubinsky-Melts Defense | |
| Feb 24, 2024 | Laurent | 1–0 | Harrison | Round 5: Laurent, Amelie - Harrison, Oliver | French Defense: Exchange Variation | |
| Feb 24, 2024 | Harrison | * | Xavier Dutton | Round 4: Harrison, Oliver - Xavier Dutton | ? | |
| Feb 24, 2024 | Nguyen | * | Harrison | Round 3: Nguyen, Thu-Nga - Harrison, Oliver | ? | |
| Feb 24, 2024 | Harrison | * | Youngin Chung | Round 2: Harrison, Oliver - Youngin Chung | ? | |
| Feb 24, 2024 | Harrison | 0–1 | Clarke | Round 5: Harrison, Oliver - Clarke, Connor | Alekhine Defense: Two Pawns Attack, Tate Variation | |
| Feb 24, 2024 | Gonzalo Baro | ½–½ | Harrison | Round 4: Gonzalo Baro - Harrison, Oliver | Four Knights Game: Scotch Variation | |
| Feb 24, 2024 | Harrison | 0–1 | Rocco | Round 3: Harrison, Oliver - Rocco, Federico | Sicilian Defense: Delayed Alapin Variation, with d6 | |
| Feb 24, 2024 | Ye | ½–½ | Harrison | Round 2: Ye, David - Harrison, Oliver | Italian Game: Two Knights Defense, Polerio Defense, Bogoljubow Variation | |
| Feb 24, 2024 | Gorgun | 1–0 | Harrison | Round 1: Gorgun, Aliriza Atif - Harrison, Oliver | Ruy Lopez: Morphy Defense | |
| Jan 7, 2024 | Harrison | 1–0 | Staniland | Caplin Hastings Weekend Major | Caro-Kann Defense: Accelerated Panov Attack, Modern Variation | |
| Jan 7, 2024 | Masani | 0–1 | Harrison | Caplin Hastings Weekend Major | Indian Defense | |
| Jan 6, 2024 | Harrison | 1–0 | Jackson | Caplin Hastings Weekend Major | French Defense: Steiner Variation | |
| Jan 6, 2024 | Knott | 1–0 | Harrison | Caplin Hastings Weekend Major | Nimzo-Indian Defense: Rubinstein System, Rubinstein Variation | |
| Jan 6, 2024 | Kim | 0–1 | Harrison | Caplin Hastings Weekend Major | Italian Game: Scotch Gambit, Max Lange Attack | |
| — | Harrison | 0–1 | Collyer | Keith Escott Memorial Congress: U2000 | Italian Game: Scotch Gambit, Max Lange Attack | |
| — | Harrison | 0–1 | Whittington | British Universities Chess Association Blitz 2025 | Sicilian Defense: Old Sicilian | |
| — | Harrison | 1–0 | Ryan | British Universities Chess Association Blitz 2025 | Sicilian Defense: Delayed Alapin Variation, with d6 | |
| — | Peer | 0–1 | Harrison | British Universities Chess Association Blitz 2025 | Barnes Opening | |