| Nov 21, 2023 | Gianmarco Leiva | 1–0 | Joseph Wan | Round 9: Gianmarco Leiva - Joseph Wan | Queen's Gambit Accepted: Old Variation | |
| Nov 20, 2023 | Doug Eckert | ½–½ | Gianmarco Leiva | Round 8: Doug Eckert - Gianmarco Leiva | English Opening: King's English Variation, Four Knights Variation, Fianchetto Line | |
| Nov 20, 2023 | Gianmarco Leiva | 1–0 | Nicholas Matta | Round 7: Gianmarco Leiva - Nicholas Matta | Petrov's Defense: Kaufmann Attack | |
| Nov 19, 2023 | Advaith Karthik | 0–1 | Gianmarco Leiva | Round 6: Advaith Karthik - Gianmarco Leiva | Nimzo-Indian Defense: Normal Variation, Gligoric System | |
| Nov 19, 2023 | Gianmarco Leiva | 1–0 | Zachary Dukic | Round 5: Gianmarco Leiva - Zachary Dukic | Zukertort Opening: Sicilian Invitation | |
| Nov 18, 2023 | Daniel Girsh | 0–1 | Gianmarco Leiva | Round 4: Daniel Girsh - Gianmarco Leiva | Nimzo-Indian Defense: Normal Variation, Botvinnik System | |
| Nov 18, 2023 | Gianmarco Leiva | 1–0 | Ansh Shah | Round 3: Gianmarco Leiva - Ansh Shah | Torre Attack: Fianchetto Defense | |
| Nov 17, 2023 | Matyas Marek | ½–½ | Gianmarco Leiva | Round 2: Matyas Marek - Gianmarco Leiva | Sicilian Defense: Moscow Variation | |
| Nov 17, 2023 | Nikolay Andrianov | ½–½ | Gianmarco Leiva | Round 1: Nikolay Andrianov - Gianmarco Leiva | Queen's Indian Defense: Traditional Variation | |
| Sep 22, 2023 | Gianmarco Leiva | * | Luis Flores Tomasto | Round 9: Gianmarco Leiva - Luis Flores Tomasto | King's Indian Attack: Symmetrical Defense | |
| Sep 19, 2023 | Gianmarco Leiva | ½–½ | Lucas Costamilan Tomiello | Round 6: Gianmarco Leiva - Lucas Costamilan Tomiello | King's Indian Attack | |
| Sep 18, 2023 | Gianmarco Leiva | ½–½ | Marco Delgado Romero | Round 5: Gianmarco Leiva - Marco Delgado Romero | Sicilian Defense: Moscow Variation, Main Line | |
| Sep 17, 2023 | Renato Terry | ½–½ | Gianmarco Leiva | Round 4: Renato Terry - Gianmarco Leiva | Horwitz Defense | |
| Sep 16, 2023 | Gianmarco Leiva | ½–½ | Jorge Cori | I CAMPEONATO SUDAMERICANO ABSOLUTO 2023 | Catalan Opening: Closed, Main Line | |
| Jun 18, 2023 | Rohan Rajaram | 1–0 | Gianmarco Leiva | Las Vegas National Open 2023 | Catalan Opening | |
| Jun 17, 2023 | Gianmarco Leiva | ½–½ | Rose Atwell | Las Vegas National Open 2023 | Caro-Kann Defense: Exchange Variation, Rubinstein Variation | |
| Jun 17, 2023 | Emilio Cordova Daza | 1–0 | Gianmarco Leiva | Las Vegas National Open 2023 | Trompowsky Attack: Classical Defense | |
| Jun 17, 2023 | Gianmarco Leiva | 1–0 | Derek Wu | Las Vegas National Open 2023 | Queen's Pawn Game: London System | |
| Jun 16, 2023 | Jeffery Wang | 0–1 | Gianmarco Leiva | Las Vegas National Open 2023 | Sicilian Defense: Najdorf Variation | |
| Jun 12, 2023 | C.S. Rajesh | 0–1 | Gianmarco Leiva | Round 9: C.S. Rajesh - Gianmarco Leiva | Queen's Pawn Game: Symmetrical Variation | |
| Jun 12, 2023 | Gianmarco Leiva | ½–½ | Aaron Jacobson | Round 8: IM Gianmarco Leiva (2405) - FM Aaron Jacobson (2301) | Nimzo-Larsen Attack: Classical Variation | |
| Jun 12, 2023 | Alexandre Kretchetov | ½–½ | Gianmarco Leiva | Round 7: Alexandre Kretchetov - Gianmarco Leiva | Nimzo-Indian Defense: Classical Variation, Noa Variation | |
| Jun 11, 2023 | Gianmarco Leiva | 0–1 | Mikhail Antipov | Round 6: Gianmarco Leiva - Mikhail Antipov | English Opening: King's English Variation, Three Knights System | |
| Jun 11, 2023 | Gianmarco Leiva | 1–0 | Erick Zhao | Round 5: Gianmarco Leiva - Erick Zhao | Sicilian Defense: Najdorf Variation, Adams Attack | |
| Jun 10, 2023 | Roman Gavrilin | 1–0 | Gianmarco Leiva | Round 4: Roman Gavrilin - Gianmarco Leiva | Ruy Lopez: Morphy Defense, Arkhangelsk Variation | |
| Jun 10, 2023 | Gianmarco Leiva | 1–0 | Neeraj Harish | Round 3: Gianmarco Leiva - Neeraj Harish | Bishop's Opening: Berlin Defense | |
| Jun 9, 2023 | Ilya Nyzhnyk | 1–0 | Gianmarco Leiva | Round 2: Ilya Nyzhnyk - Gianmarco Leiva | Queen's Gambit Declined: Three Knights Variation | |
| Jun 9, 2023 | Gianmarco Leiva | 1–0 | Rohan Rajaram | Round 1: Gianmarco Leiva - Rohan Rajaram | Sicilian Defense: Najdorf Variation, Adams Attack | |
| May 31, 2023 | Bryan Xie | 0–1 | Gianmarco Leiva | Bay Area Memorial Day Scheveningen IM Norm | Queen's Pawn Game: London System | |
| May 29, 2023 | Gianmarco Leiva | 1–0 | Vincent Qin | Round 8: Gianmarco Leiva - Patrick Liu | Sicilian Defense: Taimanov Variation, Bastrikov Variation | |
| May 29, 2023 | Gianmarco Leiva | 1–0 | Nathan Yan | Round 7: Gianmarco Leiva - Nathan Yan | Italian Game: Giuoco Piano | |
| May 28, 2023 | Pranav Sathish | 1–0 | Gianmarco Leiva | Round 6: Pranav Sathish - Gianmarco Leiva | Nimzo-Larsen Attack: Classical Variation | |
| May 28, 2023 | Gianmarco Leiva | ½–½ | Milind Maiti | Round 5: Gianmarco Leiva - Milind Maiti | Petrov's Defense: Nimzowitsch Attack | |
| May 27, 2023 | Yu-Cheng Liang | 0–1 | Gianmarco Leiva | Round 4: Yu-Cheng Liang - Gianmarco Leiva | Nimzo-Indian Defense: Normal Variation, Gligoric System | |
| May 27, 2023 | Gianmarco Leiva | ½–½ | Advay Bansal | Round 3: Gianmarco Leiva - Advay Bansal | Sicilian Defense: Najdorf Variation, English Attack | |
| May 26, 2023 | Ashritha Eswaran | ½–½ | Gianmarco Leiva | Round 2: Ashritha Eswaran - Gianmarco Leiva | Sicilian Defense: Najdorf Variation | |
| May 26, 2023 | Gianmarco Leiva | 1–0 | Andrew Guo | Round 1: Gianmarco Leiva - Andrew Guo | King's Indian Defense: Fianchetto Variation, Uhlmann-Szabo System | |
| May 23, 2023 | Josiah Stearman | ½–½ | Gianmarco Leiva | Round 11: Josiah Stearman - Gianmarco Leiva | Queen's Gambit Declined: Exchange Variation, Positional Variation | |
| May 22, 2023 | Gianmarco Leiva | 1–0 | Santiago Avila Pavas | Round 10: Gianmarco Leiva - Santiago Avila Pavas | Caro-Kann Defense: Exchange Variation, Rubinstein Variation | |
| May 21, 2023 | Gianmarco Leiva | 1–0 | Elier Miranda Mesa | Round 9: Gianmarco Leiva - Elier Miranda Mesa | Queen's Pawn Game: Symmetrical Variation | |
| May 21, 2023 | Gregory Kaidanov | 1–0 | Gianmarco Leiva | Round 8: Gregory Kaidanov - Gianmarco Leiva | Sicilian Defense: Najdorf Variation | |
| May 20, 2023 | Gianmarco Leiva | 1–0 | Jose Gabriel Cardoso Cardoso | Round 7: Gianmarco Leiva - Jose Gabriel Cardoso Cardoso | Queen's Pawn Game: Symmetrical Variation | |
| May 19, 2023 | Javiera Belen Gomez Barrera | 0–1 | Gianmarco Leiva | Round 6: Javiera Belen Gomez Barrera - Gianmarco Leiva | Sicilian Defense: Najdorf Variation, English Attack | |
| May 18, 2023 | Gianmarco Leiva | 1–0 | Jenny Astrid Chirivi C | Round 5: Gianmarco Leiva - Jenny Astrid Chirivi C | Sicilian Defense: French Variation | |
| May 17, 2023 | Brian Sebasti Escalante Ramirez | 1–0 | Gianmarco Leiva | Round 4: Brian Sebasti Escalante Ramirez - Gianmarco Leiva | Sicilian Defense: Closed | |
| May 16, 2023 | Gianmarco Leiva | ½–½ | Luis Paulo Supi | Round 3: Gianmarco Leiva - Luis Paulo Supi | Indian Defense: Knights Variation | |
| May 15, 2023 | Gianmarco Leiva | * | Paulo Santanna | Round 1: Gianmarco Leiva - Paulo Santanna | ? | |
| Apr 24, 2023 | Isaac Wang | 1–0 | Gianmarco Leiva | Round 4: Isaac Wang - Gianmarco Leiva | Queen's Gambit Declined: Janowski Variation | |
| Apr 23, 2023 | Gianmarco Leiva | 1–0 | Kritin Rohan Gopalakrishnan | Round 5: Gianmarco Leiva - Kritin Rohan Gopalakrishnan | Sicilian Defense: Nyezhmetdinov-Rossolimo Attack, Fianchetto Variation, Gufeld Gambit | |
| Apr 23, 2023 | Gianmarco Leiva | ½–½ | Patrick Peijun Liu | Round 3: Gianmarco Leiva - Patrick Peijun Liu | Sicilian Defense: Hyperaccelerated Dragon | |
| Apr 22, 2023 | Gianmarco Leiva | 1–0 | Wentao Wu | Round 2: Gianmarco Leiva - Wentao Wu | Italian Game: Classical Variation, Giuoco Pianissimo, Main Line | |
| Apr 21, 2023 | Joshua Xia | 0–1 | Gianmarco Leiva | Round 1: Joshua Xia - Gianmarco Leiva | Sicilian Defense: Najdorf Variation, Opocensky Variation | |