Stadium: COURT 1 Round: 25 Ground: Clay
| Italia - Umbrian Open | 2020/06/26 16:12 | Lorenzo Giustino v Giovanni Fonio | 7-6,5-4 |
| Challenger Todi | 2021/07/12 13:00 | Giovanni Fonio v Riccardo Balzerani | 6-3,6-3 |
| Challenger Todi | 2021/07/11 08:00 | Giovanni Fonio v Alejandro Mendoza | 6-1,6-1 |
| ITF M25 Casinalbo | 2021/07/07 08:35 | Gianmarco Ferrari v Giovanni Fonio | 6-4,7-6 |
| ITF M25 Casinalbo | 2021/07/05 15:00 | Luca Parenti v Giovanni Fonio | 0-6,0-6 |
| ITF M15 Bergamo | 2021/06/23 17:20 | Giovanni Fonio v Luca Nardi | 6-7,4-6 |
| ITF M15 Genova | 2021/06/19 13:00 | Giovanni Fonio v Luca Nardi | 3-6,1-6 |
| ITF M15 Genova | 2021/06/18 17:30 | Johan Sebastien Tatlot v Giovanni Fonio | 1-6,6-7 |
| ITF M15 Genova | 2021/06/17 17:10 | Federico Iannaccone v Giovanni Fonio | 2-6,6-7 |
| Challenger Perugia | 2021/07/06 11:10 | Timofey Skatov v Lorenzo Giustino | 1-6,7-6,6-0 |
| Challenger Porto | 2021/06/29 11:25 | Lorenzo Giustino v Frederico Ferreira Silva | 4-6,6-4,3-6 |
| Wimbledon | 2021/06/22 11:35 | Lorenzo Giustino v Illya Marchenko | 5-7,6-7 |
| Challenger Almaty | 2021/06/15 09:10 | Lorenzo Giustino v Pavel Kotov | 6-7,4-6 |
| Challenger Almaty | 2021/06/07 05:35 | Lorenzo Giustino v Timofey Skatov | 4-6,6-3,2-6 |
| Challenger Biella | 2021/06/03 11:30 | Marco Trungelliti v Lorenzo Giustino | 6-4,6-2 |
| French Open | 2021/05/25 14:25 | Lorenzo Giustino v Zhizhen Zhang | 7-5,5-7,2-6 |
| ATP Genéve | 2021/05/16 13:10 | Pablo Cuevas v Lorenzo Giustino | 6-2,6-4 |