Stadium: Court 6 Round: 25 Ground: Hardcourt outdoor
| ITF M15 Cancun | 2019/06/26 18:15 | Karl Poling v Aron Hiltzik | 7-6,6-0 |
| ITF M25 Tulsa | 2019/06/18 15:00 | Aron Hiltzik v Mate Zsiga | 4-6,7-6,4-10 |
| ITF M25 Tulsa | 2019/06/17 15:00 | Aron Hiltzik v Joshua Sheehy | 6-3,6-4 |
| ITF M15 Champaign | 2019/06/04 17:00 | Vuk Budic v Aron Hiltzik | 1-6,7-5,7-6 |
| ITF M25 Calabasas | 2019/03/18 17:00 | Gonzalo Lama v Aron Hiltzik | 7-5,7-6 |
| ITF M15 Arcadia | 2019/03/13 20:55 | Aron Hiltzik v Finn Bass | 6-2,5-7,1-6 |
| ITF M15 Arcadia | 2019/03/12 17:30 | Gage Brymer v Aron Hiltzik | 6-7,2-6 |
| ITF M15 Arcadia | 2019/03/11 17:00 | Petros Tsitsipas v Aron Hiltzik | 4-6,2-6 |
| ITF M15 Cancun | 2019/06/25 13:30 | Alan F R Fierros v Mwendwa Mbithi | 5-7,3-6 |
| ITF M15 Orlando | 2019/06/18 13:00 | Mwendwa Mbithi v Alan F R Fierros | 6-2,6-2 |
| ITF M15 Orlando | 2019/06/17 13:00 | Christopher Rosensteel v Alan F R Fierros | 5-7,1-6 |
| ITF USA F29 | 2018/10/28 16:00 | Julian Zlobinsky v Alan F R Fierros | 7-5,6-4 |
| ITF USA F29 | 2018/10/27 16:30 | Timothy Dollman v Alan F R Fierros | 4-6,7-6,4-6 |
| ITF USA F27 | 2018/10/09 16:00 | Dominik Kellovsky v Alan F R Fierros | 7-5,6-4 |
| ITF USA F27 | 2018/10/08 17:05 | Jan Galka v Alan F R Fierros | 1-6,3-6 |
| ITF USA F27 | 2018/10/07 15:00 | Alan F R Fierros v Neel Rajesh | 6-4,4-6,6-3 |