| Challenger Santa Cruz | 03/20 19:50 | 14 | Mariano Navone v Gilbert Klier Junior | 1-6,3-6 | |
| Challenger Monterrey | 03/07 18:00 | 19 | [402] Gilbert Klier Junior v William Blumberg [159] | 4-6,4-6 | |
| Challenger Monterrey | 03/06 19:45 | 14 | [408] Gilbert Klier Junior v Fabien Reboul [99] | 7-6,6-2 | |
| ITF M25 Santo Domingo | 03/04 16:15 | 27 | [247] Geoffrey Blancaneaux v Gilbert Klier Junior [408] | 6-3,6-4 | |
| ITF M25 Santo Domingo | 03/03 13:30 | 26 | Quentin Folliot v Gilbert S K Junior | 6-4,2-6,4-6 | |
| ITF M25 Santo Domingo | 03/02 15:15 | 25 | Colin Markes v Gilbert Klier Junior | 7-6,1-6,4-6 | |
| ITF M25 Santo Domingo | 02/25 14:55 | 27 | Alfredo Perez v Gilbert Klier Junior | 6-3,6-2 | |
| ITF M25 Santo Domingo | 02/24 13:30 | 26 | Gilbert Klier Junior v Christian Harrison | Walkover | |
| ITF M25 Santo Domingo | 02/23 18:25 | 25 | Alberto Puello v Gilbert Klier Junior | 1-6,0-6 | |
| Challenger Sao Paulo | 11/30 12:30 | 25 | [369] Pedro Sakamoto v Gilbert Klier Junior [410] | 2-6,7-5,7-5 | |
| Challenger Brasilia | 11/24 13:00 | 26 | [258] Pedro Cachin v Gilbert Klier Junior [416] | 3-6,6-3,7-6 | |
| Challenger Brasilia | 11/23 13:00 | 25 | [416] Gilbert Klier Junior v Alejandro Gomez [489] | 6-3,7-6 | |
| Challenger Brasilia | 11/23 13:00 | 25 | Gilbert Klier Junior v Sebastian Baez | Cancelled | |
| Challenger Campinas | 11/16 14:55 | 25 | [112] Francisco Cerundolo v Gilbert Klier Junior [415] | 6-3,6-0 | |
| Challenger Montevideo | 11/08 16:30 | 19 | [421] Gilbert Klier Junior v Facundo Juarez [388] | Retired | |
| Challenger Montevideo | 11/07 15:00 | 14 | Gilbert Klier Junior v Dario Acosta | 6-3,7-5 | |
| ITF M25 Rio do Sul | 10/21 14:50 | 26 | Gilbert Klier Junior v Pedro B Dias | 6-2,3-6,2-6 | |
| ITF M25 Rio do Sul | 10/20 14:45 | 25 | Gilbert Klier Junior v Mateo B Reyes | 3-6,6-1,6-2 | |
| ITF M25 Lima | 10/17 15:00 | 29 | Gilbert Klier Junior v Daniel Dutra Da Silva | 7-6,6-3 | |
| ITF M25 Lima | 10/16 16:40 | 28 | Gilbert Klier Junior v Jonathan Mridha | 6-4,6-3 | |
| ITF M25 Lima | 10/15 15:00 | 27 | [347] Eduard Esteve Lobato v Gilbert Klier Junior [482] | Retired | |
| ITF M25 Lima | 10/14 16:30 | 26 | Federico Zeballos v Gilbert S K Junior | 6-2,3-6,4-6 | |
| ITF M25 Lima | 10/12 17:00 | 25 | Antonio Cayetano March v Gilbert Klier Junior | 3-6,3-6 | |
| Challenger Santiago | 10/03 19:50 | 26 | [483] Gilbert Klier Junior v Carlos Gomez-Herrera [420] | 6-3,2-6,3-6 | |
| ITF M25 Medellin | 09/19 15:00 | 29 | [457] Gilbert Klier Junior v Joao Lucas Reis da Silva [445] | 6-2,6-2 | |
| ITF M25 Medellin | 09/18 14:50 | 28 | [326] Pedro Sakamoto v Gilbert Klier Junior [457] | 3-6,6-7 | |
| ITF M25 Medellin | 09/17 15:00 | 27 | Gilbert Klier Junior v Alan Kohen | 6-2,4-6,6-1 | |
| ITF M25 Medellin | 09/16 15:00 | 26 | Gilbert Klier Junior v Mateo Gomez | 6-3,6-3 | |
| ITF M25 Medellin | 09/14 18:05 | 25 | Gilbert Klier Junior v Enrique Bogo | 6-1,6-2 | |
| ITF M25 Poznan | 08/25 10:00 | 25 | Harry Wendelken v Gilbert Klier Junior | 3-6,6-4,6-2 |