Stadium: Court 5 Round: 62 Ground: Hardcourt outdoor
| ITF M15 St Petersburg | 2021/04/13 09:00 | Kiyamov, Timur v Sarp Agabigun | 6-7,4-6 |
| ITF M15 St Petersburg | 2021/04/12 07:00 | Kiyamov, Timur v Ernaelsteen, Victor | 6-2,6-2 |
| ITF M15 St Petersburg | 2021/04/11 08:05 | Kiyamov, Timur v Akhmaev, Iznaur | 6-1,6-0 |
| ITF M15 St Petersburg | 2021/04/05 08:30 | Ratniuk, Maxim v Kiyamov, Timur | 6-4,6-7,12-10 |
| ITF M15 St Petersburg | 2021/04/04 11:35 | Stepin, Alexander v Kiyamov, Timur | 4-6,3-6 |
| ITF M15 Kazan | 2021/03/10 10:00 | Shyla, Yaraslau v Kiyamov, Timur | 7-5,6-3 |
| ITF - M15 Antalya | 2021/02/07 06:00 | Kiyamov, Timur v Madaras, Dragos Nicolae | 2-6,1-6 |
| ITF - M15 Antalya | 2021/02/04 06:20 | Kiyamov, Timur v Jacopo Berrettini | 3-6,6-4,5-7 |
| ITF - M15 Monastir | 2021/06/14 08:00 | Ajeet Rai v Kim, Dong Ju | 5-7,6-4,12-10 |
| ITF - M15 Monastir | 2021/06/13 11:30 | Cotler, Lucas v Kim, Dong Ju | 2-6,2-6 |
| ITF - M15 Monastir | 2021/06/09 08:25 | Kim, Dong Ju v Park, Uisung | 2-6,1-6 |
| ITF - M15 Monastir | 2021/06/07 13:30 | Kim, Dong Ju v Sungbeen Sim | 6-0,3-6,10-7 |
| ITF - M15 Monastir | 2021/06/07 09:00 | Kazuki Nishiwaki v Kim, Dong Ju | 2-6,3-6 |
| ITF - M15 Monastir | 2021/05/30 09:30 | Kim, Dong Ju v Ren Nakamura | 7-5,6-7,5-10 |
| ITF - M15 Monastir | 2021/05/24 12:30 | Park, Uisung v Kim, Dong Ju | 6-4,6-1 |
| ITF - M15 Monastir | 2021/05/24 08:00 | Kim, Dong Ju v Lucio Carnevalle | 7-5,6-3 |