Stadium: Court 3 Round: 25 Ground: Clay
| ITF - M15 Antalya | 2021/05/27 10:15 | Giovanni Fonio v Matteo Gigante | 1-6,3-6 |
| ITF - M15 Antalya | 2021/05/26 07:30 | Giovanni Fonio v Nicolas Parizzia | 6-4,6-4 |
| Challenger - Biella | 2021/05/16 09:00 | Tomas Martin Etcheverry v Giovanni Fonio | 6-4,6-4 |
| ITF - M15 Opatija | 2021/03/28 07:55 | Giacomo Dambrosi v Giovanni Fonio | 2-6,3-6 |
| ITF - M15 Opatija | 2021/03/27 08:30 | Oleksandr Ovcharenko v Giovanni Fonio | 2-6,4-6 |
| ITF - M15 Opatija | 2021/03/26 11:10 | Giovanni Fonio v Pietro Rondoni | 6-3,6-3 |
| ITF - M15 Opatija | 2021/03/25 10:45 | Giovanni Fonio v Matteo Arnaldi | 6-3,6-1 |
| ITF - M15 Opatija | 2021/03/24 10:45 | Giovanni Fonio v Juan Bautista Otegui | 6-3,6-4 |
| ITF - M15 Antalya | 2021/05/23 07:00 | Daniil Glinka v Luca Castagnola | 6-3,3-6,10-5 |
| ITF - M15 Monastir | 2021/05/10 13:30 | Luca Castagnola v Omni Kumar | 6-7,2-6 |
| ITF - M15 Monastir | 2021/05/10 09:00 | Luca Castagnola v Taketo Takamisawa | 4-6,6-3,11-9 |
| ITF - M15 Monastir | 2021/05/03 12:00 | Luca Castagnola v Mattia Frinzi | 2-6,6-7 |
| ITF - M15 Monastir | 2021/03/30 08:00 | Luca Castagnola v Julien De Cuyper | 3-6,7-6,8-10 |
| ITF - M15 Monastir | 2021/03/29 10:30 | Colin Sinclair v Luca Castagnola | 4-6,6-3,6-10 |
| ITF - M15 Monastir | 2021/03/28 08:00 | Kirill Mishkin v Luca Castagnola | 3-6,0-6 |
| ITF - M15 Monastir | 2021/03/22 09:00 | Pietro Pampanin v Luca Castagnola | 6-2,2-6,11-9 |