| Challenger Guayaquil Qual | 10/29 00:05 | 46 | [471] Mariano Kestelboim v Alejandro Gonzalez [388] | 6-4,2-6,6-4 | |
| Challenger Guayaquil Qual | 10/28 17:40 | 45 | Ivan Endara v Mariano Kestelboim | 3-6,2-6 | |
| Challenger Lima Qual | 10/21 19:40 | 46 | Mariano Kestelboim v Michael Linzer | 0-6,1-6 | |
| Challenger Lima Qual | 10/21 14:00 | 45 | [473] Mariano Kestelboim v Maxime Janvier [425] | 6-4,6-1 | |
| Challenger Buenos Aires - Kval | 10/08 15:40 | 46 | Jose H-Fernandez v Mariano Kestelboim | 6-3,6-4 | |
| Challenger Buenos Aires - Kval | 10/07 13:00 | 45 | Carlos E. Severino v Mariano Kestelboim | 6-3,1-6,4-6 | |
| Challenger Campinas Qual | 09/30 15:30 | 46 | Mariano Kestelboim v Jose Pereira | 6-4,4-6,4-6 | |
| ITF Argentina F7 | 09/15 13:00 | 27 | [477] Daniel Dutra Da Silva v Mariano Kestelboim [395] | 1-6,6-4,6-3 | |
| ITF Argentina F7 | 09/14 12:00 | 26 | [495] Genaro Alberto Olivieri v Mariano Kestelboim [395] | 6-4,4-6,2-6 | |
| ITF Argentina F7 | 09/12 14:30 | 25 | [474] Nicolas Santos v Mariano Kestelboim [395] | 7-5,2-6,6-7 | |
| ITF Argentina F6 | 09/07 14:00 | 27 | Mariano Kestelboim v Daniel D Da Silva | 4-6,0-6 | |
| ITF Argentina F6 | 09/06 13:00 | 26 | [407] Mariano Kestelboim v Oscar Jose Gutierrez [399] | 6-0,1-6,6-4 | |
| ITF Argentina F6 | 09/05 15:30 | 25 | Mariano Kestelboim v Juan Carlos Saez | 7-6,4-6,6-4 | |
| ITF Argentina F5 | 09/01 14:00 | 28 | [407] Mariano Kestelboim v Facundo Arguello [316] | 4-6,3-6 | |
| ITF Argentina F5 | 08/31 14:00 | 27 | Tomas Lipovsek Puches v Mariano Kestelboim | 5-7,1-6 | |
| ITF Argentina F5 | 08/30 13:00 | 26 | Facundo D Acosta v Mariano Kestelboim | 1-6,3-6 | |
| ITF Argentina F5 | 08/29 15:30 | 25 | Franco Emanuel Egea v Mariano Kestelboim | 3-6,7-6,3-6 | |
| ITF Slovakia F2 | 08/03 08:00 | 26 | Mariano Kestelboim v Lukas Klein | 6-4,6-7,4-6 | |
| ITF Slovakia F2 | 08/02 08:00 | 25 | Mariano Kestelboim v Paul Jubb | 3-6,7-5,6-1 | |
| Challenger Prag - Kval | 07/22 11:30 | 46 | Jurij Rodionov v Mariano Kestelboim | 6-3,6-2 | |
| Challenger Poznan | 07/19 11:30 | 26 | [417] Mariano Kestelboim v Ruben R Hidalgo [187] | 3-6,2-6 | |
| Challenger Poznan | 07/18 10:50 | 25 | [417] Mariano Kestelboim v N.Sriram Balaji [293] | 6-4,6-4 | |
| Challenger Poznan Qual | 07/16 10:30 | 54 | Mariano Kestelboim v Julian Onken | Retired | |
| ITF Poland F4 | 07/08 09:00 | 28 | Alexei Popyrin v Mariano Kestelboim | 6-4,7-6 | |
| ITF Poland F4 | 07/07 10:40 | 27 | David Poljak v Mariano Kestelboim | 1-6,4-6 | |
| ITF Poland F4 | 07/06 08:00 | 26 | Manuel Pena Lopez v Mariano Kestelboim | 5-7,3-6 | |
| ITF Poland F4 | 07/04 14:35 | 25 | Kacper Zuk v Mariano Kestelboim | 2-6,4-6 | |
| ITF Poland F3 | 06/29 11:30 | 26 | Mariano Kestelboim v Ronald Slobodchikov | 2-6,4-6 | |
| ITF Poland F3 | 06/27 13:10 | 25 | Mariano Kestelboim v Pawel Cias | 5-7,6-4,6-2 | |
| ITF Poland F2 | 06/21 09:00 | 26 | Andre Goransson v Mariano Kestelboim | 7-6,6-4 |