stadio: Court 2 Round: 54 Ground: Hardcourt indoor
| ITF M25 Madrid | 2021/09/13 09:00 | Hermanni Tiainen v Constantinos Koshis | 4-6,4-6 |
| ITF M25 Madrid | 2021/09/12 13:00 | Hermanni Tiainen v Adria V. Ferrer | 6-3,6-3 |
| ITF M15 Helsinki | 2021/05/31 08:30 | Matvey Minin v Hermanni Tiainen | 7-6,6-1 |
| ITF M15 Kouvola | 2021/05/26 07:40 | Hermanni Tiainen v Aleksi Lofman | 6-2,3-6,4-6 |
| ITF M15 Pajulahti | 2019/09/16 10:30 | Egor Noskin v Hermanni Tiainen | 4-6,6-2,10-2 |
| ITF M15 Helsinki | 2019/08/19 11:45 | Mateusz Terczynski v Hermanni Tiainen | 6-2,6-2 |
| ITF Finlandia F4 | 2018/11/10 13:30 | Matvey Khomentovskiy v Hermanni Tiainen | 6-3,6-4 |
| ITF Estonia F3 | 2018/11/03 08:00 | Hermanni Tiainen v Philipp Klimov | 4-6,0-6 |
| ITF M25 Praga | 2021/10/03 11:30 | Ying Hou v Dominik Recek | 2-6,2-6 |
| UK Pro League | 2021/09/18 14:00 | Matthew Rutter v Ying Hou | 6-1,6-4 |
| UK Pro League | 2021/09/17 14:00 | Ying Hou v Felix Mischker | 6-7,6-1,10-7 |
| UK Pro League | 2021/09/16 16:00 | George Houghton v Ying Hou | 6-2,6-3 |
| UK Pro League | 2021/09/15 09:30 | Sean Hodkin v Ying Hou | 4-6,6-1,10-4 |
| UK Pro League | 2021/09/13 15:30 | Ying Hou v Liam Hignett | 2-6,1-6 |
| ITF M25 Bagneres-De-Bigorre | 2021/08/29 11:10 | Max Cunat v Ying Hou | 6-3,6-2 |
| ITF M15 Castelo Branco | 2021/07/25 14:00 | Antonio Prat v Ying Hou | 6-3,6-2 |