Stadium: Court 4 Round: 25 Ground: Clay
| ITF M15 Sharm El Sheikh | 2021/03/28 07:30 | Makoto Ochi v Yu Hsiou Hsu | 2-6,1-6 |
| ITF M15 Sharm El Sheikh | 2021/03/27 07:30 | Yu Hsiou Hsu v Marcello Serafini | 6-2,6-3 |
| ITF M15 Sharm El Sheikh | 2021/03/26 08:50 | David Poljak v Yu Hsiou Hsu | 3-6,6-7 |
| ITF M15 Sharm El Sheikh | 2021/03/25 09:35 | Petr Hajek v Yu Hsiou Hsu | 3-6,2-6 |
| ITF M15 Sharm El Sheikh | 2021/03/24 12:00 | Andres Gabriel Ciurletti v Yu Hsiou Hsu | 3-6,0-6 |
| ITF M15 Sharm El Sheikh | 2021/03/20 07:30 | Makoto Ochi v Yu Hsiou Hsu | 6-4,2-6,6-3 |
| ITF M15 Sharm El Sheikh | 2021/03/19 07:30 | Yu Hsiou Hsu v Mikolaj Lorens | 6-1,7-6 |
| ITF M15 Sharm El Sheikh | 2021/03/17 13:15 | Yu Hsiou Hsu v Kelsey Stevenson | 6-3,6-2 |
| Challenger Biella | 2021/05/02 14:40 | Maximilian Marterer v Alexey Vatutin | 6-2,7-5 |
| Challenger Rome Qual | 2021/04/25 11:05 | Igor Sijsling v Alexey Vatutin | 6-3,6-0 |
| Challenger Rome | 2021/04/20 08:00 | Alexey Vatutin v Vit Kopriva | 2-6,6-7 |
| Challenger Rome | 2021/04/18 13:25 | Matteo Viola v Alexey Vatutin | 3-6,7-6,1-6 |
| ITF M25 Meerbusch | 2021/04/12 12:00 | Alexey Vatutin v Tom Gentzsch | 6-3,6-1 |
| ITF M25 Meerbusch | 2021/04/12 09:30 | Alexey Vatutin v Leopold Zima | 6-4,6-2 |
| Challenger Oeiras Qual | 2021/04/04 13:10 | Alexey Vatutin v Ronald Slobodchikov | 6-2,6-3 |
| Challenger Oeiras | 2021/03/29 10:00 | Alexey Vatutin v Gian Marco Moroni | 4-6,3-6 |