| ITF M15 Monastir | 06/29 08:30 | 26 | Aziz Ouakaa v Gilbert Klier Junior | 4-6,0-6 | |
| ITF M15 Monastir | 06/28 13:30 | 25 | Linghao Zhang v Gilbert Klier Junior | 5-7,6-4,4-6 | |
| ITF M15 Monastir | 06/24 08:30 | 28 | Coleman Wong v Gilbert Klier Junior | 6-3,7-5 | |
| ITF M15 Monastir | 06/23 10:35 | 27 | Antoine Ghibaudo v Gilbert Klier Junior | 4-6,2-6 | |
| ITF M15 Monastir | 06/22 08:30 | 26 | Hamish Stewart v Gilbert Klier Junior | 3-6,4-6 | |
| ITF M15 Monastir | 06/20 10:10 | 25 | Gilbert Klier Junior v Arthur Bouquier | 6-3,6-2 | |
| ITF M15 Monastir | 06/15 08:30 | 26 | Arthur Bouquier v Gilbert Klier Junior | 6-2,6-4 | |
| ITF M15 Monastir | 06/13 09:40 | 25 | Gilbert S K Junior v Tom Gentzsch | 6-3,6-4 | |
| Challenger Orlando | 06/07 18:20 | 25 | [367] Gilbert Klier Junior v Ulises Blanch [308] | 6-7,4-6 | |
| Challenger Orlando | 06/06 15:50 | 19 | [367] Gilbert Klier Junior v Roman A Burruchaga [394] | 6-4,7-6 | |
| Challenger Orlando | 06/05 17:55 | 14 | [370] Gilbert Klier Junior v Mukund Sasikumar [430] | 6-4,6-2 | |
| Challenger Little Rock | 05/31 21:15 | 25 | [371] Gilbert Klier Junior v Hiroki Moriya [254] | 6-7,2-6 | |
| Challenger Little Rock | 05/30 15:00 | 19 | [371] Gilbert Klier Junior v Dane Sweeny [397] | 6-4,6-3 | |
| Challenger Little Rock | 05/29 15:00 | 14 | [371] Gilbert Klier Junior v Matias Franco Descotte [475] | 6-0,6-3 | |
| Challenger Coquimbo | 05/09 18:40 | 25 | [370] Gilbert Klier Junior v Facundo D Acosta [316] | 2-6,2-6 | |
| Challenger Salvador De Bahia | 05/05 15:05 | 26 | [374] Gilbert Klier Junior v Renzo Olivo [188] | 4-6,4-6 | |
| Challenger Salvador De Bahia | 05/03 17:40 | 25 | [374] Gilbert Klier Junior v Matias Zukas [422] | 6-3,6-0 | |
| Challenger Buenos Aires | 04/26 13:00 | 25 | [375] Gilbert Klier Junior v Juan Pablo Varillas [111] | 2-6,2-6 | |
| Challenger Aguascalientes | 04/17 18:00 | 14 | [417] Elmar Ejupovic v Gilbert Klier Junior [397] | 7-6,7-6 | |
| Challenger San Luis Potosi | 04/14 20:35 | 26 | [397] Gilbert Klier Junior v Nicolas Jarry [134] | 7-6,4-6,4-6 | |
| Challenger San Luis Potosi | 04/13 05:20 | 25 | Gilbert Klier Junior v Rodrigo P Mendez | 7-6,6-4 | |
| Challenger San Luis Potosi | 04/11 20:00 | 19 | [465] Nick Chappell v Gilbert Klier Junior [397] | 3-6,1-6 | |
| Challenger San Luis Potosi | 04/10 19:25 | 14 | Luca Lemaitre v Gilbert Klier Junior | 0-6,1-6 | |
| Challenger Mexico City | 04/05 17:25 | 25 | [176] Marc-Andrea Huesler v Gilbert Klier Junior [406] | 3-6,6-3,6-4 | |
| Challenger Mexico City | 04/04 18:50 | 19 | [406] Gilbert Klier Junior v Jakub Paul [454] | 6-1,6-1 | |
| Challenger Mexico City | 04/03 19:30 | 14 | Gilbert Klier Junior v Emil Reinberg | 6-4,6-2 | |
| Challenger Pereira | 03/28 19:50 | 19 | [346] Facundo Juarez v Gilbert Klier Junior [405] | 5-7,6-4,6-4 | |
| Challenger Pereira | 03/27 16:30 | 14 | Alejandro Hoyos v Gilbert Klier Junior | 6-3,1-6,3-6 | |
| Challenger Santa Cruz | 03/22 23:05 | 25 | [358] Juan Bautista Torres v Gilbert Klier Junior [405] | 6-3,6-4 | |
| Challenger Santa Cruz | 03/21 22:00 | 19 | [333] Daniel Dutra Da Silva v Gilbert Klier Junior [402] | 3-6,4-6 |