Round: 62 Ground: Clay
| ITF Argentina F4 | 2018/09/01 12:00 | Benjamin L Ambrosio v Matias Riva | 6-1,6-1 |
| ITF Argentina F3 | 2018/05/26 12:00 | Lautaro Agustin Falabella v Matias Riva | 6-1,6-3 |
| ITF Argentina F2 | 2018/05/19 12:00 | Matias Riva v Oscar Gabriel Ortiz | 1-6,3-6 |
| ITF Argentina F1 | 2018/05/13 14:30 | Alan Postay v Matias Riva | 6-3,6-0 |
| ITF Argentina F12 | 2017/12/03 12:00 | Leonardo Aboian v Matias Riva | 6-4,6-4 |
| ITF Argentina F11 | 2017/11/26 13:00 | Gaston Tonello v Matias Riva | 6-2,6-1 |
| ITF Argentina F9 | 2017/11/11 14:00 | Matias Riva v Juan M G Paiva | 0-6,6-2,6-7 |
| ITF Argentina F8 | 2017/11/05 14:30 | Matias Riva v Valentin Florez | 1-6,0-6 |
| ITF Bolivia F1 | 2018/09/11 21:10 | Alex Blumenberg v Luciano Doria | 2-6,5-7 |
| ITF Bolivia F1 | 2018/09/10 18:00 | Jose Antonio Catala v Alex Blumenberg | 1-6,3-6 |
| ITF USA F22 | 2018/08/08 20:45 | Ryan Shane v Alex Blumenberg | 7-5,6-3 |
| ITF USA F22 Qual | 2018/08/06 14:35 | Jorge Montero v Alex Blumenberg | 4-6,3-6 |
| ITF USA F22 Qual | 2018/08/05 16:00 | Louis Siegler v Alex Blumenberg | 6-3,3-6,2-6 |
| ITF USA F22 Qual | 2018/08/04 16:00 | Alex Blumenberg v Alberto Lim | 7-6,6-4 |
| ITF USA F21 Qual | 2018/07/30 15:00 | Jonathan Chang v Alex Blumenberg | 6-2,6-1 |
| ITF USA F21 Qual | 2018/07/28 17:00 | Kaptan Kaster v Alex Blumenberg | 2-6,2-6 |