Stadium: Centre Court Round: 27 Ground: Hardcourt outdoor
| Challenger Fergana | 2018/06/19 07:55 | Rubin Statham v Shuichi Sekiguchi | 6-1,6-7,2-6 |
| Challenger Fergana Qual | 2018/06/18 05:00 | Roman Safiullin v Shuichi Sekiguchi | 4-6,6-2,4-6 |
| Challenger Fergana Qual | 2018/06/17 06:25 | Altug Celikbilek v Shuichi Sekiguchi | 2-6,1-6 |
| Challenger Fergana Qual | 2018/06/16 09:40 | Shuichi Sekiguchi v Gerard Granollers-Pujol | 6-1,6-4 |
| Challenger Almaty Qual | 2018/06/10 04:30 | Shuichi Sekiguchi v Joao Menezes | 6-3,3-6,6-7 |
| Challenger Almaty Qual | 2018/06/09 04:00 | Shuichi Sekiguchi v Timur Maulenov | 7-5,6-3 |
| Challenger Shymkent Qual | 2018/06/03 04:00 | Shuichi Sekiguchi v Steven Diez | 1-6,4-6 |
| Challenger Shymkent Qual | 2018/06/02 04:00 | Robin Kern v Shuichi Sekiguchi | 4-6,2-6 |
| Challenger Fergana | 2018/06/20 06:30 | Khumoyun Sultanov v Enrique Lopez-Perez | 5-7,6-7 |
| Challenger Fergana | 2018/06/19 05:00 | David Guez v Enrique Lopez-Perez | 0-6,6-2,2-6 |
| Challenger Almaty | 2018/06/15 05:00 | Pedja Krstin v Enrique Lopez-Perez | 6-1,6-3 |
| Challenger Almaty | 2018/06/14 06:35 | Tsung-Hua Yang v Enrique Lopez-Perez | 5-7,3-6 |
| Challenger Almaty | 2018/06/13 08:25 | Enrique Lopez-Perez v Uladzimir Ignatik | 6-3,6-0 |
| Challenger Almaty | 2018/06/11 06:25 | Yasutaka Uchiyama v Enrique Lopez-Perez | 7-5,3-6,2-6 |
| Challenger Shymkent | 2018/06/05 06:10 | Laurynas Grigelis v Enrique Lopez-Perez | 6-3,7-5 |
| Challenger Vicenza | 2018/05/29 14:40 | Hugo Dellien v Enrique Lopez-Perez | 6-0,5-7,6-0 |