Stadium: Court 4 Round: 26 Ground: Clay
| Challenger Roma | 2021/04/21 09:00 | Lorenzo Giustino v Filip Horansky | 7-6,7-5 |
| Challenger Split | 2021/04/13 15:20 | Andrea Collarini v Lorenzo Giustino | 6-4,6-4 |
| ATP Marbella | 2021/04/05 10:00 | Henri Laaksonen v Lorenzo Giustino | 7-5,3-6,6-1 |
| ATP Marbella | 2021/04/04 10:00 | Roberto Marcora v Lorenzo Giustino | 6-7,4-6 |
| Challenger Marbella | 2021/03/30 09:00 | Mario Vilella Martinez v Lorenzo Giustino | 7-6,6-0 |
| ATP Miami | 2021/03/22 16:00 | Mitchell Krueger v Lorenzo Giustino | 6-4,6-3 |
| ATP Dubai | 2021/03/16 12:50 | Lorenzo Giustino v Aljaz Bedene | 4-6,3-6 |
| ATP Dubai | 2021/03/14 07:00 | Mikhail Kukushkin v Lorenzo Giustino | 6-2,6-2 |
| Challenger Roma | 2021/04/20 11:40 | Sergiy Stakhovsky v Mathias Bourgue | 6-4,3-6,7-5 |
| Challenger Lugano | 2021/03/25 11:00 | Sergiy Stakhovsky v Vitaliy Sachko | 3-6,1-6 |
| Challenger Lugano | 2021/03/23 11:25 | Sergiy Stakhovsky v Francesco Forti | 6-4,6-2 |
| Challenger Biella | 2021/03/19 13:05 | Daniel Masur v Sergiy Stakhovsky | 7-6,6-4 |
| Challenger Biella | 2021/03/17 13:35 | Sergiy Stakhovsky v Marc-Andrea Huesler | 7-5,3-6,7-6 |
| Challenger Biella | 2021/03/15 15:45 | Sergiy Stakhovsky v Matteo Gigante | 7-5,5-7,6-2 |
| Challenger Biella | 2021/03/10 11:40 | Sergiy Stakhovsky v Andreas Seppi | 2-6,4-6 |
| Davis Cup | 2021/03/06 14:05 | Sergiy Stakhovsky v Yshai Oliel | 6-4,6-2 |