| Challenger - Bogota | 09/27 16:50 | 26 | [440] Alex Barrena v Matheus P De Almeida [342] | 1-6,3-6 | |
| Challenger - Bogota | 09/26 17:35 | 25 | Matheus P De Almeida v Jose Pereira | 6-4,6-4 | |
| Challenger - Antofagasta | 09/22 15:00 | 27 | [196] Camilo Ugo Carabelli v Matheus P De Almeida [306] | 7-6,6-2 | |
| Challenger - Antofagasta | 09/20 17:05 | 26 | [306] Matheus P De Almeida v Facundo Bagnis [148] | Retired | |
| Challenger - Antofagasta | 09/18 17:00 | 25 | [306] Matheus P De Almeida v Adolfo Daniel Vallejo [447] | 6-2,2-6,6-1 | |
| Challenger - Santa Cruz | 09/14 22:00 | 26 | [145] Thiago Agustin Tirante v Matheus P De Almeida [310] | 7-6,7-6 | |
| Challenger - Santa Cruz | 09/13 00:45 | 25 | [310] Matheus P De Almeida v Marcelo Zormann [128] | 6-4,6-4 | |
| Challenger - Santo Domingo | 08/08 17:45 | 25 | [303] Matheus P De Almeida v Genaro Alberto Olivieri [193] | 2-6,6-1,2-6 | |
| Challenger - Liberec | 08/02 10:15 | 25 | [298] Matheus P De Almeida v Riccardo Bonadio [195] | 2-6,1-6 | |
| Challenger - Zug | 07/25 09:30 | 25 | [288] Matheus P De Almeida v Adrian Andreev [210] | 2-6,4-6 | |
| Challenger - Amersfoort | 07/18 12:50 | 25 | Stefano Travaglia v Matheus P De Almeida | Cancelled | |
| Challenger - Salzburg | 07/11 09:00 | 25 | [253] Matheus P De Almeida v Nerman Fatic [228] | 0-6,5-7 | |
| Challenger - Blois | 06/20 12:10 | 25 | [244] Matheus P De Almeida v Ugo Blanchet [323] | 6-7,7-6,4-6 | |
| Challenger - Lyon | 06/13 11:40 | 25 | [244] Matheus P De Almeida v Felipe Meligeni Rodrigues Alves [156] | 6-3,3-6,4-6 | |
| Challenger - Prostejov | 06/06 13:20 | 25 | [249] Matheus P De Almeida v Lukas Klein [133] | 4-6,6-3,4-6 | |
| Challenger - Prostejov | 06/05 08:00 | 19 | [249] Matheus P De Almeida v Vitaliy Sachko [275] | 3-6,6-0,7-5 | |
| Challenger - Prostejov | 06/04 09:10 | 14 | [249] Matheus P De Almeida v Gerald Melzer [407] | 6-4,6-4 | |
| Challenger - Vicenza | 06/02 09:30 | 27 | [249] Matheus P De Almeida v Francisco Comesana [241] | 2-6,2-6 | |
| Challenger - Vicenza | 05/31 13:00 | 26 | [193] Andrea Collarini v Matheus P De Almeida [249] | 3-6,5-7 | |
| Challenger - Vicenza | 05/29 15:00 | 25 | [249] Matheus P De Almeida v Francesco Maestrelli [201] | 6-2,7-5 | |
| Challenger - Skopje | 05/23 08:30 | 25 | [281] Oliver Crawford v Matheus P De Almeida [247] | 6-3,7-6 | |
| Challenger - Coquimbo | 05/06 18:00 | 29 | [282] Joao Lucas Reis da Silva v Matheus P De Almeida [293] | 6-7,7-6,4-6 | |
| Challenger - Coquimbo | 05/05 16:00 | 28 | [293] Matheus P De Almeida v Thiago Seyboth Wild [226] | 7-6,7-5 | |
| Challenger - Coquimbo | 05/04 14:30 | 27 | [472] Facundo Juarez v Matheus P De Almeida [293] | 3-6,4-6 | |
| Challenger - Coquimbo | 05/03 14:00 | 26 | [293] Matheus P De Almeida v Francisco Comesana [249] | 6-2,7-6 | |
| Challenger - Coquimbo | 05/02 15:50 | 25 | [397] Gonzalo Lama v Matheus P De Almeida [293] | 1-6,2-6 | |
| Challenger - Buenos Aires | 04/24 18:35 | 25 | [293] Matheus P De Almeida v Francisco Comesana [249] | 4-6,2-6 | |
| Challenger - Florianopolis | 04/20 22:05 | 26 | [303] Matheus P De Almeida v Alejandro Tabilo [176] | 4-6,6-7 | |
| Challenger - Florianopolis | 04/19 14:40 | 25 | Pedro Rodrigues v Matheus P De Almeida | 2-6,6-7 | |
| ATP - Rio De Janeiro | 02/18 19:00 | 14 | [105] Juan Manuel Cerundolo v Matheus P De Almeida [216] | 6-2,6-3 |