Stadium: Court 5 Round: 54 Ground: Hardcourt outdoor
| ITF - M25 Decatur | 2019/07/30 18:15 | Alfredo Perez v Alexander Klintcharov | 6-4,6-3 |
| ITF - M25 Champaign | 2019/07/23 15:00 | Alexander Klintcharov v Trey Hilderbrand | 2-6,6-4,8-10 |
| ITF M25 Iowa City | 2019/07/16 16:55 | Alexander Klintcharov v Gui Gomes | 6-3,6-7,4-10 |
| ITF - M15 Norman | 2019/07/11 14:00 | Alexander Klintcharov v Mark Whitehouse | 6-3,4-6,3-6 |
| ITF - M15 Norman | 2019/07/10 15:45 | Alexander Klintcharov v Ian Chadwell | 6-4,2-6,6-1 |
| ITF - M25 Nonthaburi | 2019/05/30 08:00 | Alexander Klintcharov v Congsup Congcar | 1-6,5-7 |
| ITF - M25 Nonthaburi | 2019/05/29 03:00 | Yuttana Charoenphon v Alexander Klintcharov | 1-6,6-3,3-6 |
| ITF - M25 Nonthaburi | 2019/05/28 06:05 | Alexander Klintcharov v Thammarat Kamchai | 6-1,6-0 |
| ITF - M25 Edwardsville | 2019/08/05 14:00 | Eric Morris v Jonathan Sorbo | 2-6,4-6 |
| ITF M25 Iowa City | 2019/07/15 15:00 | Jonathan Sorbo v Vuk Budic | 2-6,2-6 |
| ITF - M15 Norman | 2019/07/10 14:00 | Vasile-Alexandru Ghilea v Jonathan Sorbo | 6-4,6-2 |
| ITF - M15 Norman | 2019/07/09 14:00 | Jonathan Sorbo v Juan Jose Mateus Rubiano | 6-3,7-6 |
| ITF - M15 Pittsburgh | 2019/07/02 14:00 | Robert Cash v Jonathan Sorbo | 6-4,4-6,10-7 |
| ITF M15 Orlando | 2019/06/18 13:00 | Zachary Svajda v Jonathan Sorbo | 6-1,6-1 |
| ITF M15 Orlando | 2019/06/17 13:00 | David Bogatin v Jonathan Sorbo | 2-6,3-6 |
| ITF - M25 Wichita | 2019/06/10 15:00 | Quinn Vandecasteele v Jonathan Sorbo | 6-3,5-7,16-14 |