| Jan 24, 2026 | Pereira | 0–1 | Silva | Equipas SR | Sicilian Defense: French Variation | |
| Jan 24, 2026 | Alvarez Calzadilla | 1–0 | Pereira | Equipas SR | Sicilian Defense: Hyperaccelerated Dragon | |
| Sep 22, 2024 | Aziz | 1–0 | Pereira | 45th FIDE Chess Olympiad | Queen's Gambit Declined: Harrwitz Attack, Fianchetto Defense | |
| Sep 21, 2024 | Pereira | 1–0 | Bodin-Hullin | 45th FIDE Chess Olympiad | Sicilian Defense: Closed | |
| Sep 20, 2024 | Al-Hajiri | 1–0 | Pereira | 45th FIDE Chess Olympiad | Scandinavian Defense: Portuguese Gambit, Correspondence Refutation | |
| Sep 19, 2024 | Pereira | 1–0 | Misambo .J. KIlasa | 45th FIDE Chess Olympiad | Pirc Defense: Austrian Attack, Weiss Variation | |
| Sep 18, 2024 | Pereira | 0–1 | Mathurin | 45th FIDE Chess Olympiad | Sicilian Defense: Closed | |
| Sep 16, 2024 | Ahmad | 1–0 | Pereira | 45th FIDE Chess Olympiad | Queen's Pawn Game: Symmetrical Variation | |
| Sep 15, 2024 | Pereira | 1–0 | Kamara | 45th FIDE Chess Olympiad | Sicilian Defense: Closed, Anti-Sveshnikov Variation, with Nf6 | |
| Sep 14, 2024 | Pereira | 0–1 | Christie | 45th FIDE Chess Olympiad | French Defense: Exchange Variation | |
| Sep 13, 2024 | Bhakta Bahadur Monger | ½–½ | Pereira | 45th FIDE Chess Olympiad | Queen's Pawn Game: London System | |
| Sep 12, 2024 | Pereira | 0–1 | Delgado Rosas | 45th FIDE Chess Olympiad | Sicilian Defense: Four Knights Variation | |
| Sep 11, 2024 | Garcia Pantoja | 1–0 | Pereira | 45th FIDE Chess Olympiad | Sicilian Defense: Four Knights Variation | |
| Apr 27, 2024 | Pereira | ½–½ | Caturra | queimadasfitas | French Defense: Schlechter Variation | |
| Mar 20, 2024 | KIGIGHA | 0–1 | Pereira | Round 9: KIGIGHA, Bomo Lovet - Pereira, Sergio | English Opening: Agincourt Defense | |
| Mar 19, 2024 | Pereira | 1–0 | Amoako Philip Selikem Yao | Round 8: Pereira, Sergio - Amoako Philip Selikem Yao | Sicilian Defense: Closed, Traditional | |
| Mar 18, 2024 | Ameku | * | Pereira | Round 7: Ameku, David Selasi - Pereira, Sergio | ? | |
| Mar 17, 2024 | Pereira | 0–1 | Cogan | Round 6: Pereira, Sergio - Cogan, Nicolas | Sicilian Defense: Closed, Traditional | |
| Mar 17, 2024 | Pereira | * | Mills-Pappoe | Round 5: Pereira, Sergio - Mills-Pappoe, Benjamin Adoayi | ? | |
| Mar 17, 2024 | Paiva | 1–0 | Pereira | Round 4: Paiva, Donaldo - Pereira, Sergio | Queen's Gambit Accepted: Classical Defense, Rubinstein Variation | |
| Mar 17, 2024 | Pereira | 1–0 | Ortega Amarelle | 2024 AFRICAN INDIVIDUAL CHESS CHAMPIONSHIPS (OPEN) | East Indian Defense | |
| Mar 14, 2024 | ABDULRAHEEM | * | Pereira | Round 2: ABDULRAHEEM, Abdulrahman Akintoye - Pereira, Sergio | Queen's Gambit Accepted: Normal Variation | |
| Mar 11, 2024 | Kayonde | 1–0 | Pereira | Round 9: Kayonde, Andrew - Pereira, Sergio | Queen's Gambit Accepted: Mannheim Variation | |
| Mar 11, 2024 | Pereira | 0–1 | Wanyama | Round 8: Pereira, Sergio - Wanyama, Harold | Sicilian Defense: Closed | |
| Mar 11, 2024 | Akpa Prince | 0–1 | Pereira | Round 7: Akpa Prince - Pereira, Sergio | Queen's Gambit Accepted | |
| Mar 11, 2024 | Pereira | 1–0 | Oluka Robert Mcligeyo | Round 6: Pereira, Sergio - Oluka Robert Mcligeyo | Sicilian Defense: Closed, Traditional | |
| Mar 11, 2024 | Cogan | 1–0 | Pereira | Round 5: Cogan, Nicolas - Pereira, Sergio | Slav Defense: Exchange Variation | |
| Mar 11, 2024 | Fomevor | 0–1 | Pereira | Round 4: Fomevor, Cephas Clinton - Pereira, Sergio | Queen's Gambit Accepted: Showalter Variation | |
| Mar 11, 2024 | Pereira | ½–½ | Frempong-Smart Daniel | Round 3: Pereira, Sergio - Frempong-Smart Daniel | Petrov's Defense: Modern Attack | |
| Mar 11, 2024 | Pedro Manuel Envo Engonga Avomo | 1–0 | Pereira | Round 2: Pedro Manuel Envo Engonga Avomo - Sergio Pereira | Scandinavian Defense: Modern Variation | |
| Mar 11, 2024 | Pereira | * | Mhango | Round 1: Sergio Pereira - Mhango, Banele | Sicilian Defense: Closed | |
| Mar 11, 2024 | KIGIGHA | 1–0 | Pereira | Round 9: KIGIGHA, Bomo Lovet - Pereira, Sergio | English Opening: King's English Variation | |
| Mar 11, 2024 | Pereira | 0–1 | Paiva | Round 8: Pereira, Sergio - Paiva, Donaldo | Caro-Kann Defense: Two Knights Attack, Mindeno Variation, Exchange Line | |
| Mar 11, 2024 | Pereira | 1–0 | Fomevor | Round 7: Pereira, Sergio - Fomevor, Cephas Clinton | Caro-Kann Defense: Two Knights Attack | |
| Mar 11, 2024 | Cogan | 1–0 | Pereira | Round 6: Cogan, Nicolas - Pereira, Sergio | Queen's Gambit Accepted: Classical Defense, Rubinstein Variation | |
| Mar 11, 2024 | Mhango | 1–0 | Pereira | Round 5: Mhango, Banele - Pereira, Sergio | King's Indian Attack | |
| Mar 11, 2024 | Pereira | 1–0 | Asabri | Round 4: Pereira, Sergio - Asabri, Hussien | Benko Gambit Declined: Quiet Line | |
| Mar 11, 2024 | Mahamat Hachim Bachar | 0–1 | Pereira | Round 3: Mahamat Hachim Bachar - Pereira, Sergio | Scandinavian Defense: Modern Variation | |
| Mar 11, 2024 | Pereira | ½–½ | Oluka Robert Mcligeyo | Round 2: Sergio Pereira - Oluka Robert Mcligeyo | Sicilian Defense: Closed, Traditional | |
| Mar 11, 2024 | Arab | 1–0 | Pereira | Round 1: Arab, Adlane - Sergio Pereira | Queen's Gambit Declined: Exchange Variation, Sämisch Variation | |
| Mar 10, 2024 | Akpa Prince | 0–1 | Pereira | Round 6: Akpa Prince - Pereira, Sergio | Scandinavian Defense: Portuguese Gambit, Classical Variation | |
| Mar 10, 2024 | Pereira | 1–0 | Mahamat Hachim Bachar | Round 5: Pereira, Sergio - Mahamat Hachim Bachar | Ruy Lopez: Morphy Defense, Anderssen Variation | |
| Mar 10, 2024 | Rongwane | 1–0 | Pereira | Round 4: Rongwane, Gomolemo - Pereira, Sergio | Catalan Opening: Open Defense | |
| Mar 10, 2024 | Pereira | 0–1 | Pedro Manuel Envo Engonga Avomo | Round 3: Sergio Pereira - Pedro Manuel Envo Engonga Avomo | Ruy Lopez: Exchange Variation, Alapin Gambit | |
| Mar 10, 2024 | Yacouba | 0–1 | Pereira | Round 2: Yacouba, Souley Moussa - Sergio Pereira | Queen's Pawn Game: Accelerated London System | |
| Mar 10, 2024 | Pereira | 0–1 | Arab | Round 1: Sergio Pereira - Arab, Adlane | Sicilian Defense: Closed, Traditional | |
| Mar 9, 2024 | Fomevor | 1–0 | Pereira | Round 6: Fomevor, Cephas Clinton - Pereira, Sergio | Nimzo-Indian Defense: Classical Variation, Noa Variation | |
| Mar 9, 2024 | Pereira | 0–1 | Cogan | Round 5: Pereira, Sergio - Cogan, Nicolas | Alekhine Defense: Two Pawns Attack | |
| Mar 9, 2024 | Rakotomaharo | 1–0 | Pereira | Round 4: Rakotomaharo, Fy Antenaina - Pereira, Sergio | Zukertort Opening | |
| Mar 9, 2024 | Frempong-Smart Daniel | 0–1 | Pereira | Round 3: Frempong-Smart Daniel - Pereira, Sergio | Queen's Pawn Game: Symmetrical Variation, Pseudo-Catalan | |
| Mar 9, 2024 | Pereira | 0–1 | Paiva | Round 2: Pereira, Sergio - Paiva, Donaldo | Sicilian Defense: Closed | |
| Mar 9, 2024 | Pereira | 0–1 | KIGIGHA | Round 1: Sergio Pereira - KIGIGHA, Bomo Lovet | Scandinavian Defense | |
| Aug 9, 2022 | Pereira Sergio | 1–0 | Jimma Desalegn Fekadu | WCO | French Defense: Tarrasch Variation, Open System, Süchting Line | |
| Aug 8, 2022 | Blijstra Willem | 0–1 | Pereira Sergio | WCO | Queen's Gambit Accepted: Showalter Variation | |
| Aug 7, 2022 | Gong Daniel Hanwen | 1–0 | Pereira Sergio | WCO | Queen's Pawn Game: Accelerated London System | |
| Aug 6, 2022 | Pereira Sergio | ½–½ | Darmanin Jake | WCO | Italian Game: Two Knights Defense, Polerio Defense, Bishop Check Line | |
| Aug 5, 2022 | Pereira Sergio | 1–0 | Mohamed Ali Djama | WCO | Italian Game: Giuoco Pianissimo, Normal | |
| Aug 3, 2022 | Ajak Mach Duany | 1–0 | Pereira Sergio | WCO | Sicilian Defense: Closed | |
| Aug 2, 2022 | Pereira Sergio | 1–0 | Sarup Prashant | WCO | Sicilian Defense: Alapin Variation, Barmen Defense | |
| Aug 1, 2022 | Tagelsir Abubaker | 1–0 | Pereira Sergio | WCO | King's Indian Attack: Sicilian Variation | |
| Jul 31, 2022 | Pereira Sergio | 0–1 | Wanyama Harold | WCO | Sicilian Defense: Alapin Variation, Smith-Morra Declined | |
| Jul 30, 2022 | Saidou Djibo | 0–1 | Pereira Sergio | WCO | Sicilian Defense: Closed, Traditional | |
| — | Pereira Sergio | 0–1 | Batsuren Dambasuren | WCO | Nimzowitsch Defense: Williams Variation | |
