| Challenger Acapulco | 04/16 22:00 | 25 | [279] Joao Lucas Reis da Silva v Bor Artnak [478] | 4-6,2-6 | |
| Challenger Florianopolis | 04/07 13:00 | 29 | [319] Joao Lucas Reis da Silva v Enzo Couacaud [217] | 6-3,4-6,6-7 | |
| Challenger Florianopolis | 04/06 15:30 | 28 | [106] Camilo Ugo Carabelli v Joao Lucas Reis da Silva [319] | 4-6,3-6 | |
| Challenger Florianopolis | 04/05 17:10 | 27 | Joao Lucas Reis da Silva v Juan C P Angelo | 6-2,6-1 | |
| Challenger Florianopolis | 04/04 17:40 | 26 | [455] Daniel Dutra Da Silva v Joao Lucas Reis da Silva [319] | 6-1,3-6,4-6 | |
| Challenger Florianopolis | 04/01 18:00 | 25 | [296] Pedro Sakamoto v Joao Lucas Reis da Silva [319] | 5-7,5-7 | |
| Challenger - Sao Leopoldo | 03/25 23:35 | 25 | [324] Joao Lucas Reis da Silva v Goncalo Oliveira [224] | 5-7,3-6 | |
| Challenger Asunción | 03/19 19:00 | 25 | [183] Hugo Dellien v Joao Lucas Reis da Silva [324] | 6-3,6-2 | |
| Challenger - Santiago | 03/12 15:45 | 25 | [160] Juan Manuel Cerundolo v Joao Lucas Reis da Silva [312] | 6-1,6-0 | |
| ATP Rio De Janeiro | 02/17 19:00 | 14 | [310] Joao Lucas Reis da Silva v Genaro Alberto Olivieri [175] | 5-7,1-6 | |
| ATP Rio De Janeiro | 02/17 19:00 | 14 | Joao Lucas Reis da Silva v Tomas Barrios Vera | Cancelled | |
| ITF M25 Punta del Este | 02/06 19:00 | 25 | [443] Gonzalo Villanueva v Joao Lucas Reis da Silva [310] | 0-6,6-4,6-2 | |
| Challenger Piracicaba | 01/30 17:35 | 25 | [432] Juan Bautista Torres v Joao Lucas Reis da Silva [309] | 6-4,2-6,7-6 | |
| Challenger Punta del Este | 01/21 21:55 | 14 | [304] Joao Lucas Reis da Silva v Felix Gill [374] | 4-6,2-6 | |
| Challenger - Buenos Aires | 01/16 17:30 | 25 | [306] Liam Draxl v Joao Lucas Reis da Silva [304] | 6-7,6-3,6-1 | |
| Challenger - Buenos Aires | 01/13 14:00 | 28 | [415] Gonzalo Bueno v Joao Lucas Reis da Silva [313] | 6-4,6-4 | |
| Challenger - Buenos Aires | 01/12 13:00 | 27 | [429] Mateus Alves v Joao Lucas Reis da Silva [313] | 4-6,3-6 | |
| Challenger - Buenos Aires | 01/11 13:00 | 26 | [339] Pedro Sakamoto v Joao Lucas Reis da Silva [313] | 5-7,0-6 | |
| Challenger - Buenos Aires | 01/09 14:50 | 25 | [313] Joao Lucas Reis da Silva v Edoardo Lavagno [236] | 4-6,6-3,7-6 | |
| Challenger Temuco | 11/29 18:40 | 26 | [321] Joao Lucas Reis da Silva v Pedro Sakamoto [365] | 4-6,6-4,2-6 | |
| Challenger Temuco | 11/27 16:45 | 25 | [496] Gonzalo Lama v Joao Lucas Reis da Silva [321] | 2-6,1-6 | |
| Challenger - Brasilia | 11/22 13:00 | 26 | [87] Cristian Garin v Joao Lucas Reis da Silva [325] | 7-5,6-4 | |
| Challenger - Brasilia | 11/21 13:00 | 25 | [414] Gonzalo Bueno v Joao Lucas Reis da Silva [325] | 6-7,6-7 | |
| Challenger - Lima | 11/10 00:00 | 26 | [67] Juan Pablo Varillas v Joao Lucas Reis da Silva [317] | 6-2,6-0 | |
| Challenger - Lima | 11/07 19:05 | 25 | [308] Valentin Vacherot v Joao Lucas Reis da Silva [317] | 3-6,0-6 | |
| Challenger - Lima | 11/06 16:00 | 19 | [317] Joao Lucas Reis da Silva v Daniel Dutra Da Silva [417] | 6-2,5-7,6-1 | |
| Challenger - Lima | 11/05 17:20 | 14 | Joao Lucas Reis da Silva v Alberto O A Berrospi | 6-0,6-1 | |
| Challenger - Guayaquil | 10/30 19:10 | 25 | [318] Joao Lucas Reis da Silva v Camilo U Carabelli [153] | 4-6,0-6 | |
| Challenger Curitiba | 10/25 14:00 | 26 | [326] Joao Lucas Reis da Silva v Hugo Dellien [129] | 2-6,3-6 | |
| Challenger Curitiba | 10/24 13:00 | 25 | [326] Joao Lucas Reis da Silva v Arklon H D P Cordova [247] | 6-4,6-4 |