Stadium: COURT 3 Round: 26 Ground: Hardcourt indoor
| ITF M25 Jonkoping | 2021/09/21 10:40 | Elmer Moller v Lucas Renard | 3-6,6-3,6-2 |
| ITF M25 Jonkoping | 2021/09/20 07:30 | Christoffer Solberg v Elmer Moller | 6-7,1-6 |
| ITF M15 Frederiksberg | 2021/08/04 09:40 | Elmer Moller v Johannes Ingildsen | 5-7,1-6 |
| ITF M15 Vejle | 2021/07/27 08:00 | Elmer Moller v Sandro Kopp | 0-6,5-7 |
| ITF M15 Vejle | 2021/07/26 11:50 | Valdemar Frederik Pape v Elmer Moller | 2-6,4-6 |
| ITF M15 Vejle | 2021/07/25 11:00 | Felipe Mikkelsen v Elmer Moller | 1-6,6-7 |
| ITF M15 Perugia | 2021/07/18 12:30 | Leonardo Malgaroli v Elmer Moller | 6-1,3-6,10-8 |
| ITF M15 Antalya | 2021/04/04 06:30 | Elmer Moller v Taiyo Yamanaka | 4-6,4-6 |
| ITF M25 Jonkoping | 2021/09/21 07:30 | Arvid Nordquist v Khumoyun Sultanov | 3-6,3-6 |
| Davis Kupa | 2021/09/17 15:50 | Casper Ruud v Khumoyun Sultanov | 6-3,6-3 |
| Challenger Nur-Sultan | 2021/07/19 09:05 | Jason Kubler v Khumoyun Sultanov | 6-3,7-5 |
| Challenger Nur-Sultan | 2021/07/12 08:40 | Borna Gojo v Khumoyun Sultanov | 7-6,6-1 |
| Challenger Almaty | 2021/06/14 04:00 | Jesper De Jong v Khumoyun Sultanov | 6-1,6-3 |
| Challenger Almaty - selejtezők | 2021/06/13 04:00 | Grigoriy Lomakin v Khumoyun Sultanov | 0-6,3-6 |
| Challenger Almaty | 2021/06/06 08:05 | Ivan Gakhov v Khumoyun Sultanov | 6-3,6-4 |
| ITF M15 Monastir | 2021/05/27 08:30 | Khumoyun Sultanov v Eliakim Coulibaly | 7-6,4-6,2-6 |