Stadion: Court 1 Round: 25 Ground: Hardcourt indoor
| ITF - M25 - Jönköping | 2021/09/20 07:30 | Arvid Nordquist v Adam Heinonen | 6-3,6-4 |
| ITF - M15 - Lodz | 2021/08/16 08:00 | Arvid Nordquist v Juliusz Bienkiewicz | 3-6,6-4,10-5 |
| ITF - M15 - Parnu | 2021/08/04 08:25 | Arvid Nordquist v Paul Valsecchi | 5-7,1-6 |
| ITF - M15 - Parnu | 2021/08/03 07:00 | Arvid Nordquist v Pavel Shchaya-Zubrov | 6-2,6-3 |
| ITF - M15 - Parnu | 2021/08/02 07:00 | Arvid Nordquist v Peetu Pohjola | 6-4,6-0 |
| ITF - M15 - Almada | 2021/07/04 13:00 | Arvid Nordquist v Eduardo Morais | 3-6,4-6 |
| ITF - M15 - Helsinki | 2021/06/01 08:45 | Arvid Nordquist v Mikhail Minakov | 3-6,3-6 |
| ITF - M15 - Helsinki | 2021/05/31 10:00 | Arvid Nordquist v Leevi Saatela | 6-3,6-2 |
| Davis Cup | 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 - Qualifikation | 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 |
| ITF - M15 - Monastir | 2021/05/26 12:15 | Khumoyun Sultanov v Tomas Farjat | 6-3,6-4 |