Stadium: Court 1 Round: 45
| Challenger Astana | 2018/07/19 06:30 | Khumoyun Sultanov v Sebastian Ofner | 3-6,3-6 |
| Challenger Astana | 2018/07/17 05:30 | Farrukh Dustov v Khumoyun Sultanov | 4-6,2-6 |
| Challenger Astana Qual | 2018/07/15 04:30 | Arjun Kadhe v Khumoyun Sultanov | 1-6,6-3,2-6 |
| Challenger Astana Qual | 2018/07/14 05:20 | Mikhail Elgin v Khumoyun Sultanov | 2-6,4-6 |
| Challenger Fergana | 2018/06/20 06:30 | Khumoyun Sultanov v Enrique Lopez-Perez | 5-7,6-7 |
| Challenger Fergana | 2018/06/18 07:05 | Roberto Ortega-Olmedo v Khumoyun Sultanov | 6-7,3-6 |
| ITF Uzbekistan F4 | 2018/06/08 05:00 | Roman Safiullin v Khumoyun Sultanov | 6-4,7-5 |
| ITF Uzbekistan F4 | 2018/06/07 05:00 | Kristian Lozan v Khumoyun Sultanov | 4-6,4-6 |
| Challenger Orleans | 2018/09/26 09:00 | Tobias Simon v Lorenzo Sonego | 3-6,7-6,3-6 |
| Challenger Orleans | 2018/09/24 10:35 | Hugo Nys v Tobias Simon | 4-6,6-3,6-3 |
| Challenger Orleans | 2018/09/23 12:35 | Hugo Grenier v Tobias Simon | 3-6,7-6,6-7 |
| Challenger Orleans | 2018/09/22 15:15 | Tobias Simon v Tim Puetz | 6-2,4-6,7-6 |
| Challenger Istanbul | 2018/09/10 07:30 | Tim Van Rijthoven v Tobias Simon | 6-3,7-6 |
| Challenger Istanbul | 2018/09/09 09:00 | Vladimir Polyakov v Tobias Simon | 0-6,3-6 |
| Challenger Istanbul | 2018/09/08 07:00 | Isaac Stoute v Tobias Simon | 3-6,6-4,4-6 |
| Challenger Mallorca | 2018/08/28 09:30 | Tobias Simon v Sergio Gutierrez-Ferrol | 6-3,6-2 |