| Apr 20, 2026 | Leonardi | 0–1 | Macedo | Rodada 9: Leonardi, Lucas - Macedo, Felipe Cruz | French Defense: Rubinstein Variation, Blackburne Defense | |
| Apr 20, 2026 | Telles | 0–1 | Leonardi | Rodada 8: Telles, Arnoldo Beber - Leonardi, Lucas | English Opening: Anglo-Indian Defense | |
| Apr 20, 2026 | Leonardi | * | Rodrigues | Rodada 7: Leonardi, Lucas - Rodrigues, Edgar | Sicilian Defense: Kan Variation, Modern Variation | |
| Apr 20, 2026 | Ferreira | 0–1 | Leonardi | Rodada 6: Ferreira, Giovani Lima Diogo - Leonardi, Lucas | French Defense: Tarrasch Variation, Open System, Euwe-Keres Line | |
| Apr 20, 2026 | Leonardi | 0–1 | Hoffman | Rodada 5: Leonardi, Lucas - Hoffman, Alejandro | Pirc Defense | |
| Apr 20, 2026 | Mariani | 0–1 | Leonardi | Rodada 4: Mariani, Daniel Brandao - Leonardi, Lucas | Sicilian Defense: Alapin Variation, Barmen Defense | |
| Apr 20, 2026 | Leonardi | 1–0 | Godoy | Rodada 3: Leonardi, Lucas - Godoy, Ricardo Andre Leite | King's Indian Defense: Orthodox Variation, Positional Defense, Closed Line | |
| Apr 20, 2026 | Conor | 0–1 | Leonardi | Curitiba Chess Open 2026 - Blitz | French Defense: McCutcheon Variation | |
| Apr 20, 2026 | Leonardi | 1–0 | Garcia | Curitiba Chess Open 2026 - Blitz | Catalan Opening: Closed | |
| Apr 19, 2026 | Leonardi | 1–0 | Guedes | Rodada 6: Leonardi, Lucas - Guedes, Aaron Lamartine Krishna | Benko Gambit Accepted: Modern Variation | |
| Apr 19, 2026 | Telles | 0–1 | Leonardi | Rodada 5: Telles, Arnoldo Beber - Leonardi, Lucas | English Opening: King's English Variation, Four Knights Variation, Fianchetto Line, with Nb6 | |
| Apr 19, 2026 | Leonardi | * | Sousa | Rodada 4: Leonardi, Lucas - Sousa, Vinicius Moraes Avellaneda | Caro-Kann Defense: Panov Attack | |
| Apr 19, 2026 | Fier | * | Leonardi | Rodada 3: Fier, Luciano Dos Santos - Leonardi, Lucas | Réti Opening: Advance Variation | |
| Apr 19, 2026 | Leonardi | * | Detrez | Rodada 2: Leonardi, Lucas - Detrez, Luiz Roberto Andrade | Caro-Kann Defense: Advance Variation, Van der Wiel Attack | |
| Apr 19, 2026 | Song Wong Scremin | 1–0 | Leonardi | Rodada 1: Song Wong Scremin - Leonardi, Lucas | Indian Defense: Anti-Nimzo-Indian | |
| Apr 18, 2026 | Rodi | ½–½ | Leonardi | Curitiba Chess Open 2026 - Pensado | Richter-Veresov Attack | |
| Jan 21, 2026 | Perez | 1–0 | Leonardi | Round 5: Perez, Maximiliano - Leonardi, Lucas | Sicilian Defense: French Variation | |
| Dec 14, 2025 | Supi | 1–0 | Leonardi | Round 1: Supi, Luis Paulo - Leonardi, Lucas | Vienna Game: Mieses Variation | |
| Jun 22, 2025 | Rodi | 1–0 | Leonardi | IV Copa Campo Mourão de Xadrez - R$ 20.000,00 em prêmios (CONVENCIONAL) | Ruy Lopez: Morphy Defense | |
| Jun 21, 2025 | Cubas | 1–0 | Leonardi | IV Copa Campo Mourão de Xadrez - R$ 20.000,00 em prêmios (Rápido) | Queen's Pawn Game: Accelerated London System | |
| Jun 21, 2025 | Leonardi | 0–1 | Fier | IV Copa Campo Mourão - Rapid | Alekhine Defense: Exchange Variation, Voronezh Variation | |
| Jun 21, 2025 | Cubas | 1–0 | Leonardi | IV Copa Campo Mourão de Xadrez - BTZ | Sicilian Defense: Kalashnikov Variation | |
| Jun 20, 2025 | Movsziszian | ½–½ | Leonardi | IV Copa Campo Mourão - Standard | Hungarian Opening | |
| Jan 22, 2025 | Leonardi | 0–1 | Serpa | Round 7: Leonardi, Lucas - Serpa, Rafael Araujo | Catalan Opening: Open Defense | |
| Jan 22, 2025 | Leonardi | 0–1 | Rodrigues Mota | Round 1: Leonardi, Lucas - Rodrigues Mota, Romulo Cardoso S | Bogo-Indian Defense: Grünfeld Variation | |
| — | Leonardi | 0–1 | Perdomo | 4ºFestival Internacional de Catas Altas/MG - BLZ | East Indian Defense | |
| — | Leonardi | 1–0 | De Paula | 4ºFestival Internacional de Catas Altas/MG - BLZ | ? | |
| — | Leonardi | 1–0 | Terao | 4ºFestival Internacional de Catas Altas/MG - BLZ | Sicilian Defense: Kan Variation, Modern Variation | |
| — | Leonardi | 0–1 | Molina | 4ºFestival Internacional de Catas Altas/MG - BLZ | Dutch Defense: Classical Variation, Ilyin-Zhenevsky Variation | |
| — | Leonardi | 0–1 | Matsuura | 4ºFestival Internacional de Catas Altas/MG - RPD | Old Indian Defense: Two Knights Variation | |
| — | Gomes | ½–½ | Leonardi | 4ºFestival Internacional de Catas Altas/MG - BLZ | English Opening: Symmetrical Variation, Rubinstein Variation | |
| — | Castro | ½–½ | Leonardi | 4ºFestival Internacional de Catas Altas/MG - BLZ | Scotch Game: Alekhine Gambit | |
| — | Miguel Rosa Ferreira Silva | 0–1 | Leonardi | 4ºFestival Internacional de Catas Altas/MG - RPD | Italian Game: Giuoco Pianissimo | |
| — | Menezes | 1–0 | Leonardi | 4ºFestival Internacional de Catas Altas/MG - RPD | Sicilian Defense: Najdorf Variation | |