| Challenger Iasi | 07/15 14:50 | 27 | [166] Geoffrey Blancaneaux v Matheus P De Almeida [228] | 4-6,4-6 | |
| Challenger Iasi | 07/13 08:00 | 26 | [404] Joris De Loore v Matheus P De Almeida [228] | 3-6,7-6,4-6 | |
| Challenger Iasi | 07/12 07:30 | 25 | [228] Matheus P De Almeida v Alexander Shevchenko [155] | 6-1,6-4 | |
| Challenger Iasi | 07/11 08:00 | 19 | Matheus P De Almeida v Sebastian Gima | 6-2,6-4 | |
| Wimbledon | 06/22 10:00 | 19 | [178] Zsombor Piros v Matheus P De Almeida [227] | 6-4,6-4 | |
| Wimbledon | 06/20 10:00 | 14 | [217] Genaro Alberto Olivieri v Matheus P De Almeida [227] | 3-6,2-6 | |
| Challenger Ilkley | 06/12 13:30 | 14 | [249] Jason Jung v Matheus P De Almeida [221] | 6-4,1-6,7-5 | |
| Challenger - Bratislava | 06/07 08:00 | 25 | [321] Louis Wessels v Matheus P De Almeida [221] | 6-7,6-4,7-6 | |
| Challenger - Bratislava | 06/07 08:00 | 25 | [89] Henri Laaksonen v Matheus P De Almeida [221] | Cancelled | |
| Challenger - Prostejov | 06/02 11:15 | 27 | [224] Matheus P De Almeida v Vit Kopriva [167] | 3-6,3-6 | |
| Challenger - Prostejov | 06/01 08:30 | 26 | [127] Elias Ymer v Matheus P De Almeida [225] | 6-3,6-7,2-6 | |
| Challenger - Prostejov | 05/30 14:30 | 25 | [150] Dennis Novak v Matheus P De Almeida [225] | Retired | |
| Challenger Troisdorf | 05/24 09:15 | 25 | [260] Jelle Sels v Matheus P De Almeida [225] | 6-4,4-6,6-4 | |
| Prantsusmaa lahtised | 05/16 10:00 | 14 | [112] Radu Albot v Matheus P De Almeida [223] | 3-6,6-3,6-3 | |
| Challenger - Bordeaux | 05/08 08:00 | 14 | [218] Matheus P De Almeida v Mathias Bourgue [315] | 2-6,2-6 | |
| Challenger Salvador De Bahia | 05/03 16:15 | 25 | [218] Matheus P De Almeida v Wilson Leite [461] | 5-7,2-6 | |
| Challenger - San Luis Potosi | 04/12 18:00 | 25 | [220] Matheus P De Almeida v Denis Istomin [296] | 7-6,1-6,3-6 | |
| Challenger - Mexico City | 04/06 17:55 | 26 | [139] Nicolas Jarry v Matheus P De Almeida [225] | 7-6,6-2 | |
| Challenger - Mexico City | 04/04 20:25 | 25 | [225] Matheus P De Almeida v Denis Istomin [293] | 5-7,7-6,7-6 | |
| Challenger – Pereira | 03/29 18:20 | 25 | [224] Matheus P De Almeida v Yshai Oliel [345] | 6-3,3-6,4-6 | |
| Challenger Santa Cruz | 03/23 22:10 | 26 | [322] Daniel Dutra Da Silva v Matheus P De Almeida [224] | 6-4,6-4 | |
| Challenger Santa Cruz | 03/22 21:15 | 25 | [241] Andrea Collarini v Matheus P De Almeida [224] | 3-6,4-6 | |
| Challenger Concepcion | 03/18 18:15 | 27 | [241] Matheus P De Almeida v Marcelo Tomas Barrios Vera [145] | 2-6,6-3,1-6 | |
| Challenger Concepcion | 03/17 16:00 | 26 | [142] Nicolas Jarry v Matheus P De Almeida [241] | 4-6,6-3,3-6 | |
| Challenger Concepcion | 03/15 13:30 | 25 | [225] Pedro Cachin v Matheus P De Almeida [241] | Retired | |
| Challenger - Santiago | 03/11 18:00 | 27 | [241] Matheus P De Almeida v Juan Pablo Varillas [117] | 5-7,2-6 | |
| Challenger - Santiago | 03/09 15:40 | 26 | [130] Juan Ignacio Londero v Matheus P De Almeida [241] | 7-6,2-6,5-7 | |
| Challenger - Santiago | 03/07 16:30 | 25 | [241] Matheus P De Almeida v Genaro Alberto Olivieri [279] | 6-3,3-6,6-3 | |
| ATP Santiago | 02/24 22:00 | 26 | [264] Matheus P De Almeida v Miomir Kecmanovic [63] | 2-6,0-6 | |
| ATP Santiago | 02/22 23:35 | 25 | [88] Holger Vitus Nodskov Rune v Matheus P De Almeida [264] | 4-6,4-6 |