Estádio: Jaime Oncins Round: 26 Ground: Clay
| ITF - M15 São Paulo | 2023/08/22 19:00 | Santiago De La Fuente v Gustavo R de Almeida | 4-6,7-5,4-6 |
| ITF - M15 Belém | 2023/08/16 19:50 | Igor Gimenez v Gustavo R de Almeida | 6-4,1-6,6-4 |
| ITF - M15 Mogi das Cruzes | 2023/04/26 15:20 | Bruno Fernandez v Gustavo R de Almeida | 1-6,7-6,6-4 |
| Challenger - Florianopolis | 2023/04/19 13:00 | Pedro Sakamoto v Gustavo R de Almeida | 6-0,6-4 |
| ITF - M25 Vacaria | 2022/11/30 15:35 | Roman Andres Burruchaga v Gustavo R de Almeida | 6-4,6-0 |
| ITF - M25 Lajeado | 2022/11/23 13:00 | Enrique Bogo v Gustavo R de Almeida | 6-4,6-1 |
| ITF - M25 Rio de Janeiro | 2022/10/19 14:00 | Leonardo Aboian v Gustavo R de Almeida | 6-1,6-3 |
| ITF - M25 Rio de Janeiro | 2022/10/17 16:10 | Rafael Tosetto v Gustavo R de Almeida | 2-6,2-6 |
| ITF - M15 São Paulo | 2023/08/22 17:45 | Henrique Costanzi De Brito v Nicolas Villalon | 6-1,6-7,4-6 |
| ITF - M25 Trujillo | 2023/08/13 15:00 | Nikos Lehmann v Nicolas Villalon | 2-6,6-1,10-4 |
| Challenger - Santa Fe | 2023/07/04 18:20 | Matias Soto v Nicolas Villalon | 6-2,7-6 |
| Challenger - Santa Fe | 2023/07/03 13:00 | Benjamin Denis Alarcon v Nicolas Villalon | 5-7,2-6 |
| Challenger - Santa Fe | 2023/07/02 13:00 | Nicolas G Longo v Nicolas Villalon | 4-6,5-7 |
| ITF - M25 Rosário | 2023/06/28 15:25 | Lucas Catarina v Nicolas Villalon | 6-1,6-0 |
| ITF - M15 Kuršumlijska Banja | 2023/06/21 07:00 | Stefan Popovic v Nicolas Villalon | 6-3,6-1 |
| ITF - M15 Kuršumlijska Banja | 2023/06/20 07:30 | Luka Pavlovic v Nicolas Villalon | 6-1,6-7,10-4 |