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