Stadium: COURT 1 Round: 25 Ground: Clay
| Italian Umbrian Open | 2020/06/26 16:12 | Lorenzo Giustino v Giovanni Fonio | 7-6,5-4 |
| ITF M15 Genova | 2021/06/16 15:00 | Giorgio Ricca v Giovanni Fonio | 6-4,3-6,1-6 |
| ITF M15 Gaiba | 2021/06/10 12:20 | Arthur Reymond v Giovanni Fonio | 3-6,6-3,6-0 |
| ITF M15 Gaiba | 2021/06/09 08:45 | Andrea Guerrieri v Giovanni Fonio | 7-5,3-6,3-6 |
| ITF M15 Antalya | 2021/06/06 07:30 | Giovanni Fonio v Nicolas Moreno De Alboran | 5-7,4-6 |
| ITF M15 Antalya | 2021/06/05 07:20 | Gonzalo Lama v Giovanni Fonio | 6-7,5-7 |
| ITF M15 Antalya | 2021/06/04 10:05 | Giovanni Fonio v Stuart Parker | 6-3,2-6,6-1 |
| ITF M15 Antalya | 2021/06/01 09:30 | Giovanni Fonio v Luca Castagnola | 6-1,1-6,7-6 |
| ITF M15 Antalya | 2021/05/27 10:15 | Giovanni Fonio v Matteo Gigante | 1-6,3-6 |
| 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 Geneva | 2021/05/16 13:10 | Pablo Cuevas v Lorenzo Giustino | 6-2,6-4 |
| ATP Geneva | 2021/05/15 11:00 | Lorenzo Giustino v Peter Gojowczyk | 6-2,6-3 |
| Challenger Biella | 2021/05/04 08:00 | Dimitar Kuzmanov v Lorenzo Giustino | 6-3,1-6,6-3 |
| Challenger Rome | 2021/04/29 14:40 | Cem Ilkel v Lorenzo Giustino | 6-4,6-2 |