Stadium: Court 3 Round: 62 Ground: Hardcourt outdoor
| 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 |
| ITF M15 Monastir | 2021/03/21 15:00 | Luca Castagnola v Ayoub Chakrouni | 6-4,6-3 |
| ITF M15 Monastir | 2021/03/15 08:00 | Alessandro Ingarao v Luca Castagnola | 6-2,5-7,10-6 |
| ITF M15 Monastir | 2021/03/14 10:00 | Fausto Tabacco v Luca Castagnola | 5-7,3-6 |
| ITF M15 Monastir | 2021/03/08 13:30 | Colin Sinclair v Luca Castagnola | 6-3,6-4 |
| ITF M15 Monastir | 2021/05/02 12:00 | Theo Arribage v Mattia Frinzi | 6-7,1-6 |
| ITF M15 Opatija | 2021/03/23 10:20 | Aleksandre Bakshi v Mattia Frinzi | 6-2,6-3 |
| ITF M15 Opatija | 2021/03/22 13:15 | Stefan Loncar v Mattia Frinzi | 3-6,6-7 |
| ITF M15 Opatija | 2021/03/21 08:00 | Milan Radojkovic v Mattia Frinzi | 0-6,1-6 |
| ITF M15 Rovinj | 2021/03/14 08:30 | Josip Krstanovic v Mattia Frinzi | 6-2,7-6 |
| ITF M15 Porec | 2021/03/09 09:00 | Gergely Madarasz v Mattia Frinzi | 7-5,6-3 |
| ITF M15 Porec | 2021/03/07 11:00 | Roko Horvat v Mattia Frinzi | 1-6,1-6 |
| ITF M25 Trento | 2020/02/26 12:50 | Mattia Frinzi v Mick Veldheer | 1-6,4-6 |