Round: 54 Ground: Clay
| ITF Argentina F1 | 2018/05/13 14:30 | Postay, Alan v Matias Riva | 6-3,6-0 |
| Junin, Singles M-ITF-ARG-23A | 2019/10/21 12:00 | Lautaro Agustin Falabella v Matias Riva | 4-6,5-7 |
| Buenos Aires, Singles Qualifying M-ITF-ARG-22A | 2019/09/16 15:00 | Matias Riva v Derdoy, Felipe | 6-4,3-6,2-10 |
| Buenos Aires, Singles Qualifying M-ITF-ARG-22A | 2019/09/15 15:30 | Matias Riva v Lautaro Agustin Falabella | 4-6,7-6,14-12 |
| Koksijde, Singles M-ITF-BEL-04A | 2019/08/12 12:40 | Matias Riva v Wakita, Shunsuke | 1-6,4-6 |
| Targu Mures, Singles M-ITF-ROU-05A | 2019/08/05 09:00 | Andrea Picchione v Matias Riva | 6-2,2-6,10-6 |
| Chitila, Singles M-ITF-ROU-06A | 2019/07/29 12:00 | Matias Riva v Derdoy, Felipe | 0-6,3-6 |
| ITF Chile F3 | 2018/11/25 14:00 | Moreno, Federico v Matias Riva | 6-1,6-2 |
| ITF Chile F2 | 2018/11/17 16:00 | Matias Riva v Aguilar, Federico Juan | 2-6,3-6 |
| ITF - M15 Santiago | 2019/10/02 11:00 | Postay, Alan v Carraro, Luciano | 2-6,4-6 |
| ITF - M15 Santiago | 2019/09/30 14:00 | Postay, Alan v Barros Troncoso, Marcelo Ignacio | 6-3,6-0 |
| Buenos Aires, Singles Qualifying M-ITF-ARG-22A | 2019/09/15 17:00 | Doria, Luciano v Postay, Alan | 6-3,5-7,10-4 |
| ITF M15 Cancun | 2019/08/28 18:25 | Postay, Alan v Brandon Walkin | 5-7,3-6 |
| ITF M15 Cancun | 2019/08/26 18:00 | Postay, Alan v Shamma, Nicholas | 1-6,1-6 |
| ITF M15 Cancun | 2019/08/26 14:30 | Postay, Alan v Jirasook, Kyler | 7-6,6-2 |
| ITF M15 Cancun | 2019/08/19 20:00 | Miles Jones v Postay, Alan | 6-2,6-0 |
| ITF M15 Cancun | 2019/08/13 16:15 | Brandon Walkin v Postay, Alan | 6-0,6-3 |