Stadium: Court 4 Round: 25 Ground: Hardcourt outdoor
| ITF USA F23 | 2018/08/17 16:20 | Vasil Kirkov v Andrew Harris | 3-6,6-1,4-6 |
| ITF USA F23 | 2018/08/15 18:35 | Vasil Kirkov v Alan Kohen | 7-5,6-3 |
| ITF USA F22 | 2018/08/08 18:30 | Santiago Rodriguez Taverna v Vasil Kirkov | 3-6,6-3,6-4 |
| ITF USA F22 Qual | 2018/08/06 13:30 | Vasil Kirkov v Gage Brymer | 7-6,6-4 |
| ITF USA F22 Qual | 2018/08/05 14:30 | Vasil Kirkov v Sid Donarski | 6-3,6-2 |
| Challenger Binghamton Qual | 2018/07/21 18:55 | Andrew Harris v Vasil Kirkov | 6-7,6-3,6-2 |
| Challenger Winnetka Qual | 2018/07/07 15:00 | Vasil Kirkov v Emil Reinberg | 5-7,2-6 |
| ITF Canada F5 | 2018/07/04 22:00 | Alexis Galarneau v Vasil Kirkov | 6-3,5-7,7-5 |
| Challenger Gwangju | 2018/08/14 08:25 | Hiroyasu Ehara v Karim-Mohamed Maamoun | 1-6,6-7 |
| Challenger Jinan | 2018/08/07 09:15 | Yusuke Takahashi v Hiroyasu Ehara | 6-4,6-3 |
| Challenger Chengdu Qual | 2018/07/29 05:40 | Hiroyasu Ehara v Blake Ellis | 3-6,3-6 |
| Challenger Chengdu Qual | 2018/07/28 08:05 | Hiroyasu Ehara v Runhao Hua | 7-5,4-6,7-6 |
| Challenger Astana | 2018/07/17 06:05 | Hiroyasu Ehara v Ivan Gakhov | 3-6,6-7 |
| ITF Guam F1 | 2018/06/23 00:00 | Hiroyasu Ehara v Yuta Shimizu | 6-3,2-6,3-6 |
| ITF Guam F1 | 2018/06/22 00:00 | Hiroyasu Ehara v Sho Katayama | 7-6,6-4 |
| ITF Guam F1 | 2018/06/20 02:00 | Hiroyasu Ehara v Naru Shirafuji | 6-4,6-3 |