Stadium: Court 6 Round: 62 Ground: Clay
| ITF M15 St Petersburg | 2021/04/15 13:40 | Matvey Minin v Savriyan Danilov | 3-6,1-6 |
| ITF M15 St Petersburg | 2021/04/13 10:30 | Matvey Minin v Boris Pokotilov | 6-4,6-7,6-3 |
| ITF M15 St Petersburg | 2021/04/12 08:35 | Matvey Minin v Stepan Pecak | 7-5,6-3 |
| ITF M15 St Petersburg Qual | 2021/04/11 13:30 | Matvey Minin v Egor Novikov | 6-2,6-4 |
| ITF M15 St Petersburg | 2021/04/04 07:00 | Martin Borisiouk v Matvey Minin | 6-3,6-4 |
| ITF M25 La Nucia | 2021/03/16 08:30 | Imanol L Morillo v Matvey Minin | 6-2,6-3 |
| ITF M25 La Nucia | 2021/03/15 11:00 | Lluc Mir Anglada v Matvey Minin | 6-7,0-6 |
| ITF M25 La Nucia | 2021/03/14 14:00 | Higinio Sanchis Melero v Matvey Minin | 1-6,1-6 |
| ITF M15 Majadahonda | 2021/05/03 10:45 | Emilien Voisin v Ryan Nijboer | 5-7,6-2,10-4 |
| ITF M15 Sharm El Sheikh | 2021/04/07 11:15 | Ryan Nijboer v Yuta Shimizu | 2-6,2-6 |
| ITF M15 Sharm El Sheikh | 2021/04/03 07:30 | Mattia Bellucci v Ryan Nijboer | 7-6,6-4 |
| ITF M15 Sharm El Sheikh | 2021/04/02 07:30 | Ryan Nijboer v David Poljak | 6-2,2-6,6-4 |
| ITF M15 Sharm El Sheikh | 2021/04/01 09:10 | Ryan Nijboer v Leonardo Malgaroli | 6-4,7-5 |
| ITF M15 Sharm El Sheikh | 2021/03/31 13:25 | Oscar Jose Gutierrez v Ryan Nijboer | 7-6,2-6,3-6 |
| ITF M15 Sharm El Sheikh | 2021/03/24 09:15 | David Poljak v Ryan Nijboer | 6-1,6-4 |
| ITF M15 Sharm El Sheikh | 2021/03/14 09:30 | Ryan Nijboer v Daniel Little | 4-6,4-6 |