| Challenger Buenos Aires | 09/30 14:00 | 19 | [379] Joao Lucas Reis da Silva v Tomas Farjat [477] | 6-7,2-6 | |
| Challenger Buenos Aires | 09/29 13:00 | 14 | Joao Lucas Reis da Silva v Ezequiel Monferrer | 6-1,6-2 | |
| Challenger Antofagasta | 09/23 17:55 | 25 | [379] Joao Lucas Reis da Silva v Franco Roncadelli [354] | 5-7,1-6 | |
| Challenger Bogota | 08/05 20:30 | 25 | [314] Joao Lucas Reis da Silva v Jay Clarke [307] | 4-6,1-6 | |
| Challenger San Marino | 07/30 10:25 | 25 | [280] Samuel Vincent Ruggeri v Joao Lucas Reis da Silva [325] | 6-4,6-1 | |
| Challenger San Marino | 07/29 11:15 | 19 | [325] Joao Lucas Reis da Silva v Gonzalo Villanueva [392] | 6-1,6-3 | |
| Challenger San Marino | 07/28 13:25 | 14 | Joao Lucas Reis da Silva v Andrea Guerrieri | 6-3,6-2 | |
| Challenger Verona | 07/24 11:05 | 26 | [336] Joao Lucas Reis da Silva v Jesper De Jong [112] | 4-6,1-6 | |
| Challenger Verona | 07/23 10:10 | 25 | Lorenzo Sciahbasi v Joao Lucas Reis da Silva | 1-6,1-6 | |
| Challenger Verona | 07/22 09:35 | 19 | Joao Lucas Reis da Silva v Luca Giacomini | 6-4,7-6 | |
| Challenger Verona | 07/21 14:25 | 14 | Joao Lucas Reis da Silva v Francesco Ferrari | 6-1,6-4 | |
| Challenger Amersfoort | 07/14 16:30 | 14 | Deney Wassermann v Joao Lucas Reis da Silva | 4-6,6-3,6-4 | |
| Challenger Santa Cruz | 06/18 22:15 | 25 | [320] Hernan Casanova v Joao Lucas Reis da Silva [329] | 6-2,6-2 | |
| Challenger Lima | 06/13 16:00 | 26 | [323] Joao Lucas Reis da Silva v Pedro Boscardin Dias [235] | 2-6,6-7 | |
| Challenger Lima | 06/12 00:30 | 25 | [273] Gonzalo Bueno v Joao Lucas Reis da Silva [323] | 6-7,4-6 | |
| Challenger Porto Alegre | 05/01 13:00 | 25 | [210] Kaichi Uchida v Joao Lucas Reis da Silva [282] | Retired | |
| Challenger Savannah | 04/21 17:25 | 14 | [279] Joao Lucas Reis da Silva v Viktor Durasovic [489] | 6-3,3-6,2-6 | |
| 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 Asuncion | 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 |