Stadium: Court 7 Round: 62 Ground: Hardcourt outdoor
| ITF - M15 Monastir | 2021/05/03 12:00 | Kawahashi, Yuta v Pietro Pampanin | 6-4,6-4 |
| ITF - M15 Monastir | 2021/05/02 12:00 | Kawahashi, Yuta v Ammar Elamin | 6-3,6-3 |
| ITF - M15 Monastir | 2021/05/01 08:30 | Kawahashi, Yuta v Lucas Catarina | 3-6,1-6 |
| ITF - M15 Monastir | 2021/04/30 11:55 | Kawahashi, Yuta v Remy Bertola | 6-4,6-1 |
| ITF - M15 Monastir | 2021/04/29 11:20 | Mariano Kestelboim v Kawahashi, Yuta | 1-6,1-6 |
| ITF - M15 Monastir | 2021/04/28 08:30 | Kawahashi, Yuta v Guido Ivan Justo | 6-4,6-2 |
| ITF - M15 Monastir | 2021/04/26 13:30 | Kawahashi, Yuta v Marcello Serafini | 6-3,6-1 |
| ITF - M15 Monastir | 2021/04/26 09:00 | Kawahashi, Yuta v Davies, George | 6-2,6-3 |
| ITF - M15 Monastir | 2021/05/03 12:00 | Luca Castagnola v Frinzi, Mattia | 2-6,6-7 |
| ITF - M15 Monastir | 2021/05/02 12:00 | Theo Arribage v Frinzi, Mattia | 6-7,1-6 |
| ITF - M15 Opatija | 2021/03/23 10:20 | Aleksandre Bakshi v Frinzi, Mattia | 6-2,6-3 |
| ITF - M15 Opatija | 2021/03/22 13:15 | Loncar, Stefan v Frinzi, Mattia | 3-6,6-7 |
| ITF - M15 Opatija | 2021/03/21 08:00 | Radojkovic, Milan v Frinzi, Mattia | 0-6,1-6 |
| ITF - M15 Rovinj | 2021/03/14 08:30 | Krstanovic, Josip v Frinzi, Mattia | 6-2,7-6 |
| ITF - M15 Porec | 2021/03/09 09:00 | Gergely Madarasz v Frinzi, Mattia | 7-5,6-3 |
| ITF - M15 Porec | 2021/03/07 11:00 | Roko Horvat v Frinzi, Mattia | 1-6,1-6 |