| May 22, 2026 | Venkatesh | 1–0 | Sivathanujan | Round 6: Venkatesh, M.R. - Sivathanujan, S | Sicilian Defense: Kan Variation, Maróczy Bind, Réti Variation | |
| Apr 26, 2026 | Sivathanujan | ½–½ | Weerasekara | Round 12: Sivathanujan, S - Weerasekara, Dishal Nimsara | Sicilian Defense: Old Sicilian | |
| Apr 26, 2026 | Bandara | ½–½ | Sivathanujan | Round 11: Bandara, Dhanushka - Sivathanujan, S | Sicilian Defense: Kan Variation, Polugaevsky Variation | |
| Apr 25, 2026 | Sivathanujan | 1–0 | Arunakirinathan | Round 10: Sivathanujan, S - Arunakirinathan, Aruthran | Caro-Kann Defense: Accelerated Panov Attack, Modern Variation | |
| Apr 25, 2026 | Sandaruwan | 0–1 | Sivathanujan | Round 9: Sandaruwan, K E Dineth - Sivathanujan, S | Queen's Pawn Game: Accelerated London System | |
| Apr 24, 2026 | Sivathanujan | 1–0 | Kiringoda | Round 8: Sivathanujan, S - Kiringoda, Thehas Rithmitha | Italian Game: Two Knights Defense, Modern Bishop's Opening | |
| Apr 24, 2026 | Ovitigala | 0–1 | Sivathanujan | Round 7: Ovitigala, Chenitha Mithvidu - Sivathanujan, S | Sicilian Defense: Kan Variation, Modern Variation | |
| Apr 20, 2026 | Sivathanujan | ½–½ | Induwara | Round 6: Sivathanujan, S - Induwara, T H D Thisarindu | French Defense: Tarrasch Variation | |
| Apr 19, 2026 | Janukshan | ½–½ | Sivathanujan | Round 2: Janukshan, B - Sivathanujan, S | Queen's Gambit Accepted: Classical Defense, Rubinstein Variation | |
| Apr 19, 2026 | Sivathanujan | 1–0 | Insara | Round 1: Sivathanujan, S - Insara, S D Nadev | French Defense: Tarrasch Variation, Morozevich Variation | |
| Apr 19, 2026 | Sivathanujan | ½–½ | Wijerathna | Round 5: Sivathanujan, S - Wijerathna, Vinuka Dihain | Italian Game: Two Knights Defense, Modern Bishop's Opening | |
| Apr 19, 2026 | Dabarera | ½–½ | Sivathanujan | Round 4: Dabarera, G W D M - Sivathanujan, S | Sicilian Defense: Wing Gambit | |
| Apr 19, 2026 | Sivathanujan | ½–½ | Karunasena | Round 3: Sivathanujan, S - Karunasena, A P Chenitha Sihas Dinsara | Italian Game: Classical Variation, Giuoco Pianissimo | |
| May 1, 2025 | Sivathanujan | 0–1 | Grigoryan | KCA’s International Chess Festival God’s Own Country’s 1st GM International Category-A | Sicilian Defense: Delayed Alapin Variation, with d6 | |
| Mar 17, 2025 | Thilakarathne | 1–0 | Sivathanujan | Round 8: Thilakarathne, G M H - Sivathanujan, S | Sicilian Defense: O'Kelly Variation, Réti System | |
| Mar 14, 2025 | Manon | 1–0 | Sivathanujan | Round 5: Manon, Reja Neer - Sivathanujan, S | Sicilian Defense: Kan Variation, Knight Variation | |
| Mar 13, 2025 | Sakline Mostafa | ½–½ | Sivathanujan | Round 4: Sakline Mostafa, Sajid - Sivathanujan, S | Slav Defense: Quiet Variation | |
| Mar 11, 2025 | Mohammad Fahad | 1–0 | Sivathanujan | Round 2: Mohammad Fahad, Rahman - Sivathanujan, S | Queen's Gambit Declined: Albin Countergambit, Normal Line | |
| Jul 29, 2024 | Sivathanujan | 1–0 | Das | Round 2: Sivathanujan, S - Das, Sayantan | Caro-Kann Defense: Two Knights Attack, Mindeno Variation, Exchange Line | |
| Jan 20, 2024 | Sivathanujan | 0–1 | Patil | 1st Bangalore International Grandmasters Open Chess Tournament-2024 (Category 'B') | Italian Game: Classical Variation, Giuoco Pianissimo, with d6 | |
| Jan 19, 2024 | Dhrikshu | ½–½ | Sivathanujan | 1st Bangalore International Grandmasters Open Chess Tournament-2024 (Category 'B') | Queen's Pawn Game | |
| Aug 4, 2024 | Sivathanujan | 1–0 | Sathsindu | Round 10: Sivathanujan, S - Sathsindu, W M Minura | Sicilian Defense: Delayed Alapin Variation, with d6 | |
| Aug 3, 2024 | DickmaduGodage | 0–1 | Sivathanujan | Round 9: DickmaduGodage, Ravi Prabath - Sivathanujan, S | Sicilian Defense: Closed | |
| Aug 2, 2024 | Sivathanujan | 0–1 | Mitrabha | Round 8: Sivathanujan, S - Mitrabha, Guha | Caro-Kann Defense: Two Knights Attack, Mindeno Variation, Exchange Line | |
| Aug 2, 2024 | Gnanaseelan | 0–1 | Sivathanujan | Round 7: Gnanaseelan, Jude Dorison - Sivathanujan, S | Sicilian Defense: Kan Variation, Modern Variation | |
| Jul 31, 2024 | Sivathanujan | 0–1 | Hari Madhavan N B | Round 4: Sivathanujan, S - Hari Madhavan N B | French Defense: Schlechter Variation | |
| Jul 31, 2024 | Ganepola | ½–½ | Sivathanujan | Round 5: Ganepola, Thushanu Yasmith - Sivathanujan, S | Slav Defense: Exchange Variation | |
| Jul 30, 2024 | Savchenko | ½–½ | Sivathanujan | Round 3: Savchenko, Boris - Sivathanujan, S | Sicilian Defense: Kan Variation, Modern Variation | |
| Dec 24, 2023 | Sivathanujan | 0–1 | Glek | VELAMMAL HOSPITAL PRESENTS ATHENS OF THE EAST 3rd GRAND MASTER CHESS TOURNAMENT (Category-A) | Sicilian Defense: Delayed Alapin Variation, with e6 | |
| Jun 20, 2022 | Sivathanujan | 1–0 | Shivani Senthilkumar | 13th Chennai Open | ? | |
| Jun 20, 2022 | Murali Krishnan B T | * | Sivathanujan | 13th Chennai Open | ? | |
| Jun 19, 2022 | Nitesh Sai Sundaram | 0–1 | Sivathanujan | 13th Chennai Open | ? | |
