Round: 44 Ground: Clay
| Challenger Astana Qual | 2018/07/14 06:50 | Pavel Kotov v Sultan Narbekov | 6-1,6-3 |
| ITF Kazakhstan F5 Qual | 2018/04/23 05:00 | Vladislav Dubinsky v Sultan Narbekov | 6-1,6-0 |
| ITF Kazakhstan F4 Qual | 2018/04/15 09:00 | Sultan Narbekov v Imanol L Morillo | 3-6,4-6 |
| ITF Kazakhstan F4 Qual | 2018/04/14 10:10 | Aliaksandr Prudnikau v Sultan Narbekov | 6-7,3-6 |
| ITF Kazakhstan F3 Qual | 2018/04/08 07:30 | Rafik Terzyan v Sultan Narbekov | 7-5,6-0 |
| ITF Kazakhstan F2 Qual | 2018/02/17 04:00 | Sultan Narbekov v Viacheslav Yulik | 1-6,6-7 |
| Challenger Almaty Qual | 2017/09/30 05:30 | Sultan Narbekov v Denys Molchanov | 4-6,4-6 |
| ITF Kazakhstan F7 Qual | 2017/09/25 04:00 | George Tsivadze v Sultan Narbekov | 7-5,6-3 |